/usr/bin/java -Xmx8000000000 -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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:21:13,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:21:13,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:21:13,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:21:13,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:21:13,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:21:13,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:21:13,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:21:13,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:21:13,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:21:13,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:21:13,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:21:13,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:21:13,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:21:13,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:21:13,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:21:13,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:21:13,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:21:13,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:21:13,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:21:13,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:21:13,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:21:13,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:21:13,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:21:13,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 02:21:13,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 02:21:13,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 02:21:13,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 02:21:13,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 02:21:13,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 02:21:13,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 02:21:13,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 02:21:13,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 02:21:13,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 02:21:13,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 02:21:13,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 02:21:13,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 02:21:13,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 02:21:13,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:21:13,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:21:13,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:21:13,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 02:21:13,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:21:13,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:21:13,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:21:13,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:21:13,270 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:21:13,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:21:13,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:21:13,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:21:13,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:21:13,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:21:13,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:21:13,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:21:13,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:21:13,272 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:21:13,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:21:13,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:21:13,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:21:13,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:21:13,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:21:13,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:21:13,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:21:13,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:21:13,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:21:13,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:21:13,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:21:13,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:21:13,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:21:13,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:21:13,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:21:14,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:21:14,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:21:14,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:21:14,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:21:14,480 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:21:14,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-17 02:21:14,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f9ffe90/89cc04f4b7204368b3a2475a80f2b4b3/FLAGfdce9caa6 [2020-09-17 02:21:15,198 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:21:15,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-17 02:21:15,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f9ffe90/89cc04f4b7204368b3a2475a80f2b4b3/FLAGfdce9caa6 [2020-09-17 02:21:15,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f9ffe90/89cc04f4b7204368b3a2475a80f2b4b3 [2020-09-17 02:21:15,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:21:15,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:21:15,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:21:15,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:21:15,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:21:15,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:21:15" (1/1) ... [2020-09-17 02:21:15,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13275c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:15, skipping insertion in model container [2020-09-17 02:21:15,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:21:15" (1/1) ... [2020-09-17 02:21:15,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:21:15,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:21:16,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:21:16,035 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:21:16,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:21:16,213 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:21:16,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16 WrapperNode [2020-09-17 02:21:16,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:21:16,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:21:16,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:21:16,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:21:16,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:21:16,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:21:16,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:21:16,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:21:16,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:21:16,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:21:16,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:21:16,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:21:16,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (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 [2020-09-17 02:21:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:21:16,419 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:21:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:21:16,420 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:21:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:21:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:21:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:21:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:21:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:21:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:21:16,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:21:16,426 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:21:16,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:21:16,818 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:21:16,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:21:16 BoogieIcfgContainer [2020-09-17 02:21:16,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:21:16,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:21:16,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:21:16,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:21:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:21:15" (1/3) ... [2020-09-17 02:21:16,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffdf21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:21:16, skipping insertion in model container [2020-09-17 02:21:16,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (2/3) ... [2020-09-17 02:21:16,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffdf21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:21:16, skipping insertion in model container [2020-09-17 02:21:16,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:21:16" (3/3) ... [2020-09-17 02:21:16,839 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-17 02:21:16,859 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:21:16,859 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:21:16,870 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:21:16,871 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:21:16,902 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,907 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,908 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,908 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,917 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,917 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,918 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,918 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,952 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:21:16,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:21:16,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:21:16,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:21:16,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:21:16,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:21:16,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:21:16,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:21:16,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:21:17,003 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,006 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,055 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-17 02:21:17,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:21:17,063 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. [2020-09-17 02:21:17,066 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,087 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-17 02:21:17,087 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:21:17,089 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. [2020-09-17 02:21:17,091 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-17 02:21:17,093 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:21:18,209 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-17 02:21:18,307 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-17 02:21:18,307 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-17 02:21:18,312 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:21:18,327 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:21:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:21:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:21:18,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:18,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:21:18,340 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-17 02:21:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:18,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202467686] [2020-09-17 02:21:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:18,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202467686] [2020-09-17 02:21:18,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:18,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:21:18,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766286411] [2020-09-17 02:21:18,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:21:18,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:21:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:21:18,674 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:21:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:18,748 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-17 02:21:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:21:18,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:21:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:18,768 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:21:18,769 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:21:18,771 INFO L675 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 [2020-09-17 02:21:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:21:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-17 02:21:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:21:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-17 02:21:18,823 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-17 02:21:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:18,824 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-17 02:21:18,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:21:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-17 02:21:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:18,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:18,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:21:18,826 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-17 02:21:18,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:18,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299138581] [2020-09-17 02:21:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:18,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299138581] [2020-09-17 02:21:18,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:18,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:18,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969906830] [2020-09-17 02:21:18,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:18,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:18,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:18,980 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-17 02:21:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,047 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-17 02:21:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:19,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,049 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:21:19,049 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:21:19,050 INFO L675 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 [2020-09-17 02:21:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:21:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-17 02:21:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:21:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 02:21:19,061 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-17 02:21:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,063 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 02:21:19,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 02:21:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:19,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:21:19,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-17 02:21:19,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651479428] [2020-09-17 02:21:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651479428] [2020-09-17 02:21:19,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:19,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318684679] [2020-09-17 02:21:19,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,183 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-17 02:21:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,210 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-17 02:21:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:21:19,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,212 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:21:19,212 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:21:19,213 INFO L675 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 [2020-09-17 02:21:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:21:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-17 02:21:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:21:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-17 02:21:19,222 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-17 02:21:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,223 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-17 02:21:19,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-17 02:21:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:19,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:21:19,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-17 02:21:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629482269] [2020-09-17 02:21:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629482269] [2020-09-17 02:21:19,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:19,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:19,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47355291] [2020-09-17 02:21:19,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:19,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,304 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-17 02:21:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,358 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-17 02:21:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:19,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,360 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:21:19,361 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:21:19,361 INFO L675 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 [2020-09-17 02:21:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:21:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-17 02:21:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:21:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-17 02:21:19,370 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-17 02:21:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,371 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-17 02:21:19,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-17 02:21:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:19,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,372 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:21:19,372 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-17 02:21:19,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346672782] [2020-09-17 02:21:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346672782] [2020-09-17 02:21:19,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137710529] [2020-09-17 02:21:19,457 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 [2020-09-17 02:21:19,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:19,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:19,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-17 02:21:19,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140986853] [2020-09-17 02:21:19,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:21:19,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:21:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:19,638 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-17 02:21:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,743 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-17 02:21:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:19,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-17 02:21:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,746 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:21:19,746 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:21:19,746 INFO L675 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 [2020-09-17 02:21:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:21:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-17 02:21:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:21:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-17 02:21:19,754 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-17 02:21:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,755 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-17 02:21:19,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:21:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-17 02:21:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:19,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,756 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:19,971 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-17 02:21:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494943787] [2020-09-17 02:21:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494943787] [2020-09-17 02:21:20,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909517088] [2020-09-17 02:21:20,087 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 [2020-09-17 02:21:20,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:20,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:20,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:20,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:20,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569209790] [2020-09-17 02:21:20,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:20,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:20,227 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-17 02:21:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:20,308 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:21:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:20,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:20,310 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:21:20,310 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:21:20,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:21:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-17 02:21:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:21:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-17 02:21:20,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-17 02:21:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:20,319 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-17 02:21:20,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-17 02:21:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:20,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:20,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:20,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:20,537 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-17 02:21:20,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:20,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899938341] [2020-09-17 02:21:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899938341] [2020-09-17 02:21:20,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159171552] [2020-09-17 02:21:20,605 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 [2020-09-17 02:21:20,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:20,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:20,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35742142] [2020-09-17 02:21:20,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:20,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:20,734 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-17 02:21:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:20,817 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-17 02:21:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:20,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:20,819 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:21:20,819 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:21:20,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:21:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-17 02:21:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:21:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-17 02:21:20,828 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-17 02:21:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:20,829 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-17 02:21:20,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-17 02:21:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:20,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:20,830 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:21,043 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-17 02:21:21,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509380924] [2020-09-17 02:21:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509380924] [2020-09-17 02:21:21,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452512107] [2020-09-17 02:21:21,142 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 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 [2020-09-17 02:21:21,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:21,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:21,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:21,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:21,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761102303] [2020-09-17 02:21:21,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:21,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:21,280 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-17 02:21:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:21,435 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:21:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:21,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:21,437 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:21:21,437 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:21:21,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:21:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-17 02:21:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:21:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-17 02:21:21,458 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-17 02:21:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:21,459 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-17 02:21:21,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-17 02:21:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:21,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:21,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:21,662 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-17 02:21:21,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432951971] [2020-09-17 02:21:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432951971] [2020-09-17 02:21:21,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:21,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:21,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682226091] [2020-09-17 02:21:21,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:21,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:21,750 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-17 02:21:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:21,795 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-17 02:21:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:21,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:21,797 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:21:21,797 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:21:21,798 INFO L675 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 [2020-09-17 02:21:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:21:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-17 02:21:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:21:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-17 02:21:21,805 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-17 02:21:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:21,805 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-17 02:21:21,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-17 02:21:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:21,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:21,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-17 02:21:21,807 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-17 02:21:21,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094393468] [2020-09-17 02:21:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094393468] [2020-09-17 02:21:21,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:21,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:21,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720026466] [2020-09-17 02:21:21,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:21,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:21,884 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-17 02:21:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:21,960 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 02:21:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:21,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:21,961 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:21:21,961 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:21:21,962 INFO L675 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 [2020-09-17 02:21:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:21:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-17 02:21:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:21:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-17 02:21:21,967 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-17 02:21:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:21,968 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-17 02:21:21,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-17 02:21:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:21,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:21,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-17 02:21:21,969 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,970 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-17 02:21:21,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025192153] [2020-09-17 02:21:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025192153] [2020-09-17 02:21:22,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:22,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:22,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098043072] [2020-09-17 02:21:22,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:22,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:22,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:22,054 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-17 02:21:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:22,144 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-17 02:21:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:22,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:22,146 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:21:22,146 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:21:22,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:21:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-17 02:21:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:21:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-17 02:21:22,160 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-17 02:21:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:22,161 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-17 02:21:22,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-17 02:21:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:22,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:22,163 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:22,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-17 02:21:22,164 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-17 02:21:22,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:22,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183006251] [2020-09-17 02:21:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183006251] [2020-09-17 02:21:22,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988485106] [2020-09-17 02:21:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:21:22,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:22,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:22,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-17 02:21:22,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304763659] [2020-09-17 02:21:22,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:21:22,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:21:22,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:22,437 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-17 02:21:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:22,542 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-17 02:21:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:22,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-17 02:21:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:22,544 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:21:22,544 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:21:22,545 INFO L675 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 [2020-09-17 02:21:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:21:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-17 02:21:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:21:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-17 02:21:22,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-17 02:21:22,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:22,551 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-17 02:21:22,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:21:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-17 02:21:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:22,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:22,553 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:22,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-17 02:21:22,768 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-17 02:21:22,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:22,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138966383] [2020-09-17 02:21:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138966383] [2020-09-17 02:21:22,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817308701] [2020-09-17 02:21:22,840 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 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 [2020-09-17 02:21:22,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:22,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:22,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:22,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664368022] [2020-09-17 02:21:22,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:22,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:22,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:22,964 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-17 02:21:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:23,044 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:21:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:23,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:23,047 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:21:23,047 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:21:23,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:21:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-17 02:21:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:21:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-17 02:21:23,052 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-17 02:21:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:23,053 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-17 02:21:23,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-17 02:21:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:23,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:23,054 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:23,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:23,266 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-17 02:21:23,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:23,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378697129] [2020-09-17 02:21:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378697129] [2020-09-17 02:21:23,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516882703] [2020-09-17 02:21:23,342 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 [2020-09-17 02:21:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:23,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:23,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061147434] [2020-09-17 02:21:23,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:23,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:23,517 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-17 02:21:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:23,656 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-17 02:21:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:23,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:23,659 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:21:23,659 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:21:23,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:21:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-17 02:21:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:21:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-17 02:21:23,665 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-17 02:21:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:23,666 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-17 02:21:23,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-17 02:21:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:23,667 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:23,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 02:21:23,881 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-17 02:21:23,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:23,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721212953] [2020-09-17 02:21:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721212953] [2020-09-17 02:21:23,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195912373] [2020-09-17 02:21:23,956 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 [2020-09-17 02:21:24,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:24,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:24,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:24,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:24,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106218943] [2020-09-17 02:21:24,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:24,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:24,105 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-17 02:21:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:24,241 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-17 02:21:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:24,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:24,243 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:21:24,243 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:21:24,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:21:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-17 02:21:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:21:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-17 02:21:24,256 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-17 02:21:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:24,256 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-17 02:21:24,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-17 02:21:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:24,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:24,257 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:24,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:21:24,469 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-17 02:21:24,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:24,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071338375] [2020-09-17 02:21:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071338375] [2020-09-17 02:21:24,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574067896] [2020-09-17 02:21:24,565 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 [2020-09-17 02:21:24,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:24,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:24,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:24,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:24,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892492263] [2020-09-17 02:21:24,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:24,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:24,689 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-17 02:21:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:24,907 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-17 02:21:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:24,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:24,909 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:21:24,909 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:21:24,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:21:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-17 02:21:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:21:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-17 02:21:24,914 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-17 02:21:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:24,914 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-17 02:21:24,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-17 02:21:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:24,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:24,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:25,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:21:25,125 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-17 02:21:25,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:25,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375745892] [2020-09-17 02:21:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375745892] [2020-09-17 02:21:25,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657919315] [2020-09-17 02:21:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:25,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:25,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:25,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:25,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:25,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618421338] [2020-09-17 02:21:25,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:25,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:25,353 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-17 02:21:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:25,407 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-17 02:21:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:25,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:25,409 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:21:25,409 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:21:25,409 INFO L675 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 [2020-09-17 02:21:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:21:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-17 02:21:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:21:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-17 02:21:25,414 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-17 02:21:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:25,414 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-17 02:21:25,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-17 02:21:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:25,415 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:25,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:21:25,628 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-17 02:21:25,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:25,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573536935] [2020-09-17 02:21:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573536935] [2020-09-17 02:21:25,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175058240] [2020-09-17 02:21:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:25,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:25,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:25,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126723466] [2020-09-17 02:21:25,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:25,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:25,812 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-17 02:21:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:25,899 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-17 02:21:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:25,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:25,901 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:21:25,901 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:21:25,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:21:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-17 02:21:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:21:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-17 02:21:25,906 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-17 02:21:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:25,907 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-17 02:21:25,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-17 02:21:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:25,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:25,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:26,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:21:26,117 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-17 02:21:26,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:26,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445595207] [2020-09-17 02:21:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445595207] [2020-09-17 02:21:26,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429259308] [2020-09-17 02:21:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:26,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:26,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:26,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:26,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:26,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929943734] [2020-09-17 02:21:26,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:26,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:26,358 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-17 02:21:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:26,495 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-17 02:21:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:26,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:26,496 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:21:26,497 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:21:26,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:21:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-17 02:21:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:21:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-17 02:21:26,501 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-17 02:21:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:26,501 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-17 02:21:26,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-17 02:21:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:26,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:26,502 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:26,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:26,704 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-17 02:21:26,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:26,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027864156] [2020-09-17 02:21:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027864156] [2020-09-17 02:21:26,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719765996] [2020-09-17 02:21:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:26,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:26,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844821278] [2020-09-17 02:21:26,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:26,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:26,975 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-17 02:21:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:27,042 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-17 02:21:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:27,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:27,044 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:21:27,045 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:21:27,045 INFO L675 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 [2020-09-17 02:21:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:21:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-17 02:21:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:21:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-17 02:21:27,049 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-17 02:21:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:27,049 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-17 02:21:27,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-17 02:21:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:27,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:27,050 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:27,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-17 02:21:27,261 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-17 02:21:27,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:27,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735343679] [2020-09-17 02:21:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735343679] [2020-09-17 02:21:27,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979612641] [2020-09-17 02:21:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:27,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:27,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:27,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:27,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204896561] [2020-09-17 02:21:27,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:27,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:27,468 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:27,558 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-17 02:21:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:27,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:27,559 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:21:27,559 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:21:27,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:21:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-17 02:21:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-17 02:21:27,564 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-17 02:21:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:27,565 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-17 02:21:27,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-17 02:21:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:27,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:27,566 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:27,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:27,767 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-17 02:21:27,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:27,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155927497] [2020-09-17 02:21:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155927497] [2020-09-17 02:21:27,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762493702] [2020-09-17 02:21:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:27,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:28,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:28,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299415501] [2020-09-17 02:21:28,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:28,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:28,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:28,027 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-17 02:21:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:28,100 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:21:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:28,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:28,102 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:21:28,102 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:21:28,102 INFO L675 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 [2020-09-17 02:21:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:21:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-17 02:21:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:21:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-17 02:21:28,109 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-17 02:21:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:28,109 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-17 02:21:28,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-17 02:21:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:28,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:28,110 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:28,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:21:28,321 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-17 02:21:28,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:28,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248692033] [2020-09-17 02:21:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248692033] [2020-09-17 02:21:28,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128378665] [2020-09-17 02:21:28,389 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 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 [2020-09-17 02:21:28,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:28,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:28,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:28,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:28,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116061195] [2020-09-17 02:21:28,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:28,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:28,587 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-17 02:21:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:28,838 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-17 02:21:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:28,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:28,840 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:21:28,841 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:21:28,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:21:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-17 02:21:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:21:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-17 02:21:28,846 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-17 02:21:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:28,846 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-17 02:21:28,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-17 02:21:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:28,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:28,847 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:29,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:29,059 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-17 02:21:29,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:29,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758230036] [2020-09-17 02:21:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758230036] [2020-09-17 02:21:29,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179812725] [2020-09-17 02:21:29,132 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 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 [2020-09-17 02:21:29,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:29,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:29,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:29,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931263828] [2020-09-17 02:21:29,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:29,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:29,256 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:29,393 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-17 02:21:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:29,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:29,398 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:21:29,398 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:21:29,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:21:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-17 02:21:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:21:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-17 02:21:29,402 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-17 02:21:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:29,403 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-17 02:21:29,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-17 02:21:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:29,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:29,403 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:29,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:21:29,611 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-17 02:21:29,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:29,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619461533] [2020-09-17 02:21:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619461533] [2020-09-17 02:21:29,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760305253] [2020-09-17 02:21:29,676 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 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 [2020-09-17 02:21:29,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:29,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:29,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:29,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619858873] [2020-09-17 02:21:29,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:29,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:29,794 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-17 02:21:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:30,070 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-17 02:21:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:30,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:30,072 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:21:30,072 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:21:30,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:21:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-17 02:21:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:21:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-17 02:21:30,080 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-17 02:21:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:30,080 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-17 02:21:30,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-17 02:21:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:30,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:30,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:30,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:21:30,296 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-17 02:21:30,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:30,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171805894] [2020-09-17 02:21:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:30,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171805894] [2020-09-17 02:21:30,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414681389] [2020-09-17 02:21:30,386 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 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 [2020-09-17 02:21:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:30,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:30,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:30,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:30,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:30,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879067882] [2020-09-17 02:21:30,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:30,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:30,510 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-17 02:21:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:30,731 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-17 02:21:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:30,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:30,732 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:30,733 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:30,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 02:21:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-17 02:21:30,737 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-17 02:21:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:30,737 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-17 02:21:30,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-17 02:21:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:30,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:30,738 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:30,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:21:30,948 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-17 02:21:30,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:30,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850607454] [2020-09-17 02:21:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850607454] [2020-09-17 02:21:31,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097092618] [2020-09-17 02:21:31,029 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 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 [2020-09-17 02:21:31,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:31,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:31,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853772508] [2020-09-17 02:21:31,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:31,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:31,165 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-17 02:21:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:31,296 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-17 02:21:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:31,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:31,298 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:21:31,298 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:21:31,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:21:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-17 02:21:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-17 02:21:31,303 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-17 02:21:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:31,303 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-17 02:21:31,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-17 02:21:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:31,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:31,304 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:31,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-17 02:21:31,516 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-17 02:21:31,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:31,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410927598] [2020-09-17 02:21:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410927598] [2020-09-17 02:21:31,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101709561] [2020-09-17 02:21:31,586 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 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 [2020-09-17 02:21:31,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:31,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:31,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880977292] [2020-09-17 02:21:31,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:31,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:31,720 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-17 02:21:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:32,010 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-17 02:21:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:32,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:32,012 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:21:32,012 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:21:32,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:21:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-17 02:21:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-17 02:21:32,017 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-17 02:21:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:32,017 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-17 02:21:32,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-17 02:21:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:32,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:32,018 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:32,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:21:32,219 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-17 02:21:32,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:32,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233539177] [2020-09-17 02:21:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:32,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233539177] [2020-09-17 02:21:32,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319202090] [2020-09-17 02:21:32,287 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 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 [2020-09-17 02:21:32,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:32,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:32,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:32,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458291151] [2020-09-17 02:21:32,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:32,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:32,409 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:32,684 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-17 02:21:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:21:32,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:32,685 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:32,685 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:32,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:21:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 02:21:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-17 02:21:32,690 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-17 02:21:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:32,691 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-17 02:21:32,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-17 02:21:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:32,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:32,691 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:32,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:32,902 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-17 02:21:32,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:32,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161662892] [2020-09-17 02:21:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161662892] [2020-09-17 02:21:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149002949] [2020-09-17 02:21:32,969 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 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 [2020-09-17 02:21:33,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:33,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:33,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:33,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:33,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289087771] [2020-09-17 02:21:33,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:33,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:33,095 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:33,462 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-17 02:21:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:33,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:33,464 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:21:33,464 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:21:33,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:21:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:21:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-17 02:21:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-17 02:21:33,469 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-17 02:21:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:33,470 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-17 02:21:33,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:33,470 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-17 02:21:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:33,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:33,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:33,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:33,681 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-17 02:21:33,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:33,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314462733] [2020-09-17 02:21:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:33,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314462733] [2020-09-17 02:21:33,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007834540] [2020-09-17 02:21:33,751 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 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 [2020-09-17 02:21:33,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:33,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:33,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:33,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:33,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478669348] [2020-09-17 02:21:33,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:33,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:33,875 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-17 02:21:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:34,166 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-17 02:21:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:34,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:34,168 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:34,168 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:34,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-17 02:21:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:21:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-17 02:21:34,173 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-17 02:21:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:34,174 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-17 02:21:34,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-17 02:21:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:34,175 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:34,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:34,386 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-17 02:21:34,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:34,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857539576] [2020-09-17 02:21:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857539576] [2020-09-17 02:21:34,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620889970] [2020-09-17 02:21:34,471 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 [2020-09-17 02:21:34,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:34,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:34,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-17 02:21:34,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103136268] [2020-09-17 02:21:34,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:21:34,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:34,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:21:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:34,660 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-17 02:21:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:34,804 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-17 02:21:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:34,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-17 02:21:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:34,806 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:21:34,806 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:21:34,806 INFO L675 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 [2020-09-17 02:21:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:21:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-17 02:21:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:21:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-17 02:21:34,812 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-17 02:21:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:34,812 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-17 02:21:34,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:21:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-17 02:21:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:34,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:34,813 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:35,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:21:35,024 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-17 02:21:35,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:35,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923599912] [2020-09-17 02:21:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923599912] [2020-09-17 02:21:35,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525466962] [2020-09-17 02:21:35,113 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 [2020-09-17 02:21:35,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:35,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:35,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183904549] [2020-09-17 02:21:35,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:35,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:35,272 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-17 02:21:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:35,404 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:21:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:35,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:35,406 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:21:35,406 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:35,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-17 02:21:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:21:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-17 02:21:35,412 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-17 02:21:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:35,412 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-17 02:21:35,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-17 02:21:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:35,413 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:35,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:35,624 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:35,624 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-17 02:21:35,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:35,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481644366] [2020-09-17 02:21:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481644366] [2020-09-17 02:21:35,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397149845] [2020-09-17 02:21:35,700 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 [2020-09-17 02:21:35,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:21:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:35,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:35,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903081737] [2020-09-17 02:21:35,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:35,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:35,867 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-17 02:21:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:36,073 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-17 02:21:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:36,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:36,075 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:21:36,075 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:21:36,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:21:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-17 02:21:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:21:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-17 02:21:36,081 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-17 02:21:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:36,081 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-17 02:21:36,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-17 02:21:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:36,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:36,082 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:36,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:21:36,295 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-17 02:21:36,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:36,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981468717] [2020-09-17 02:21:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981468717] [2020-09-17 02:21:36,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358701792] [2020-09-17 02:21:36,385 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 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 [2020-09-17 02:21:36,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:21:36,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:36,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:36,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:36,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670710895] [2020-09-17 02:21:36,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:36,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:36,548 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-17 02:21:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:36,788 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-17 02:21:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:36,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:36,789 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:21:36,789 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:21:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:21:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-17 02:21:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 02:21:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-17 02:21:36,794 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-17 02:21:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:36,794 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-17 02:21:36,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-17 02:21:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:36,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:36,795 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:37,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:37,006 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-17 02:21:37,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:37,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324507434] [2020-09-17 02:21:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324507434] [2020-09-17 02:21:37,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458051690] [2020-09-17 02:21:37,094 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 [2020-09-17 02:21:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:37,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:37,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927006363] [2020-09-17 02:21:37,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:37,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:37,249 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-17 02:21:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:37,461 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-17 02:21:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:37,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:37,463 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:21:37,463 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:21:37,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:21:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-17 02:21:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 02:21:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-17 02:21:37,470 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-17 02:21:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:37,470 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-17 02:21:37,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-17 02:21:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:37,471 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:37,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:21:37,675 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:37,676 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-17 02:21:37,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:37,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555855438] [2020-09-17 02:21:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555855438] [2020-09-17 02:21:37,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558848352] [2020-09-17 02:21:37,756 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 [2020-09-17 02:21:37,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:37,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:37,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263471722] [2020-09-17 02:21:37,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:37,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:37,901 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-17 02:21:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:38,209 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:38,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:38,210 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:38,210 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:21:38,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:21:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:21:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-17 02:21:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 02:21:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-17 02:21:38,228 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-17 02:21:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:38,228 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-17 02:21:38,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-17 02:21:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:38,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:38,229 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:38,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:38,440 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-17 02:21:38,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:38,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378930570] [2020-09-17 02:21:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:38,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378930570] [2020-09-17 02:21:38,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667574585] [2020-09-17 02:21:38,537 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 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 [2020-09-17 02:21:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:38,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:38,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:38,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247571546] [2020-09-17 02:21:38,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:38,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:38,687 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-17 02:21:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:38,750 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-17 02:21:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:38,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:38,751 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:21:38,751 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:21:38,752 INFO L675 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 [2020-09-17 02:21:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:21:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-17 02:21:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 02:21:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-17 02:21:38,755 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-17 02:21:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:38,755 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-17 02:21:38,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-17 02:21:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:38,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:38,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:38,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:21:38,966 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-17 02:21:38,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:38,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714519722] [2020-09-17 02:21:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714519722] [2020-09-17 02:21:39,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028032152] [2020-09-17 02:21:39,060 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 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 [2020-09-17 02:21:39,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:39,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:39,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621913872] [2020-09-17 02:21:39,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:39,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:39,241 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-17 02:21:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:39,331 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 02:21:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:39,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:39,333 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:21:39,333 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:21:39,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:21:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-17 02:21:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 02:21:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-17 02:21:39,337 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-17 02:21:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:39,338 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-17 02:21:39,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-17 02:21:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:39,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:39,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:21:39,548 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-17 02:21:39,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:39,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59563408] [2020-09-17 02:21:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59563408] [2020-09-17 02:21:39,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458310903] [2020-09-17 02:21:39,645 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 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 [2020-09-17 02:21:39,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:39,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:39,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:39,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:39,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:39,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188604037] [2020-09-17 02:21:39,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:39,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:39,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:39,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:39,811 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-17 02:21:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:39,933 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:39,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:39,935 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:39,935 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:21:39,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:21:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-17 02:21:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 02:21:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-17 02:21:39,940 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-17 02:21:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:39,940 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-17 02:21:39,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-17 02:21:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:39,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:39,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:40,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:21:40,152 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-17 02:21:40,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:40,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104208138] [2020-09-17 02:21:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104208138] [2020-09-17 02:21:40,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504864225] [2020-09-17 02:21:40,238 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 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 [2020-09-17 02:21:40,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:40,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:40,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561306760] [2020-09-17 02:21:40,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:40,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:40,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:40,410 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:40,632 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:40,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:40,634 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:40,634 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:21:40,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:21:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-17 02:21:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-17 02:21:40,638 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-17 02:21:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:40,639 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-17 02:21:40,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-17 02:21:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:40,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:40,640 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:40,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:21:40,851 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-17 02:21:40,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:40,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241183125] [2020-09-17 02:21:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241183125] [2020-09-17 02:21:40,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502054130] [2020-09-17 02:21:40,933 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 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 [2020-09-17 02:21:40,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:41,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:41,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516364643] [2020-09-17 02:21:41,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:41,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:41,105 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-17 02:21:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:41,274 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-17 02:21:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:41,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:41,276 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:21:41,276 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:21:41,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:21:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-17 02:21:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-17 02:21:41,280 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-17 02:21:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:41,281 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-17 02:21:41,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-17 02:21:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:41,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:41,281 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:41,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:41,491 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-09-17 02:21:41,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:41,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528250790] [2020-09-17 02:21:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528250790] [2020-09-17 02:21:41,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757827050] [2020-09-17 02:21:41,620 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 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 [2020-09-17 02:21:41,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:41,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:41,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:41,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873912453] [2020-09-17 02:21:41,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:41,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:41,787 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-17 02:21:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:41,860 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-17 02:21:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:41,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:41,862 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:21:41,862 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:21:41,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:21:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-17 02:21:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:21:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-17 02:21:41,867 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-17 02:21:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:41,867 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-17 02:21:41,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-17 02:21:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:41,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:42,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-17 02:21:42,079 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-17 02:21:42,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:42,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596023728] [2020-09-17 02:21:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596023728] [2020-09-17 02:21:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623521173] [2020-09-17 02:21:42,200 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 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 [2020-09-17 02:21:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:42,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:42,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905895279] [2020-09-17 02:21:42,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:42,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:42,369 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-17 02:21:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:42,460 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-17 02:21:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:42,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:42,462 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:21:42,462 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:21:42,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:21:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-17 02:21:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-17 02:21:42,467 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-17 02:21:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:42,467 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-17 02:21:42,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-17 02:21:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:42,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:42,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:21:42,679 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-17 02:21:42,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:42,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015700193] [2020-09-17 02:21:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015700193] [2020-09-17 02:21:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760337277] [2020-09-17 02:21:42,778 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 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 [2020-09-17 02:21:42,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:42,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:42,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742161184] [2020-09-17 02:21:42,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:42,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:42,981 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-17 02:21:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:43,150 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-17 02:21:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:43,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:43,152 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:21:43,152 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:21:43,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:21:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:21:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-17 02:21:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 02:21:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-17 02:21:43,159 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-17 02:21:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:43,159 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-17 02:21:43,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-17 02:21:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:43,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:43,163 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:43,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:43,375 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-17 02:21:43,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:43,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429168582] [2020-09-17 02:21:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429168582] [2020-09-17 02:21:43,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245226547] [2020-09-17 02:21:43,479 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 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 [2020-09-17 02:21:43,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:43,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:43,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:43,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443417806] [2020-09-17 02:21:43,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:43,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:43,641 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-17 02:21:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:43,731 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-17 02:21:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:43,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:43,733 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:21:43,733 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:21:43,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:21:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-17 02:21:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-17 02:21:43,738 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-17 02:21:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:43,739 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-17 02:21:43,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-17 02:21:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:43,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:43,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:43,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:21:43,946 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-17 02:21:43,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:43,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056321915] [2020-09-17 02:21:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056321915] [2020-09-17 02:21:44,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024435895] [2020-09-17 02:21:44,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:44,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:44,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:44,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841899740] [2020-09-17 02:21:44,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:44,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:44,224 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:44,352 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-17 02:21:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:44,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:44,354 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:21:44,355 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:21:44,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:21:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-17 02:21:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-17 02:21:44,359 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-17 02:21:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:44,359 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-17 02:21:44,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-17 02:21:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:44,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:44,360 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:44,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:44,567 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-17 02:21:44,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:44,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683460309] [2020-09-17 02:21:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683460309] [2020-09-17 02:21:44,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535490847] [2020-09-17 02:21:44,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:44,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:44,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:44,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379312743] [2020-09-17 02:21:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:44,827 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-17 02:21:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:44,953 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 02:21:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:44,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:44,955 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:21:44,955 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:21:44,955 INFO L675 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 [2020-09-17 02:21:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:21:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-17 02:21:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:44,958 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:44,958 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:44,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:44,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:44,959 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:45,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:21:45,162 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:45,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-17 02:21:45,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:45,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015885550] [2020-09-17 02:21:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015885550] [2020-09-17 02:21:45,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854881940] [2020-09-17 02:21:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:45,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:21:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:45,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:21:45,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85301788] [2020-09-17 02:21:45,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:45,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:45,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:45,317 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 9 states. [2020-09-17 02:21:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:45,496 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-17 02:21:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:45,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:21:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:45,506 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:21:45,506 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:21:45,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:21:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-17 02:21:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:21:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-17 02:21:45,511 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-17 02:21:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:45,512 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-17 02:21:45,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-17 02:21:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:45,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:45,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:21:45,724 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-17 02:21:45,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:45,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063793680] [2020-09-17 02:21:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063793680] [2020-09-17 02:21:45,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376216903] [2020-09-17 02:21:45,802 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 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 [2020-09-17 02:21:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:45,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:45,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416203600] [2020-09-17 02:21:45,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:45,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:45,977 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-17 02:21:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:46,198 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-17 02:21:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:46,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:46,200 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:21:46,201 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:21:46,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:21:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-17 02:21:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:46,205 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:46,205 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:46,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:46,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:46,206 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:46,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:21:46,410 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-17 02:21:46,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:46,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053151693] [2020-09-17 02:21:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:46,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053151693] [2020-09-17 02:21:46,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908551542] [2020-09-17 02:21:46,498 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 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 [2020-09-17 02:21:46,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:46,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:46,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:46,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:46,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179127305] [2020-09-17 02:21:46,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:46,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:46,701 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-17 02:21:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:47,123 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-17 02:21:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:21:47,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:47,126 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:21:47,127 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 02:21:47,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:21:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 02:21:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-17 02:21:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:47,131 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:47,131 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:47,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:47,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:47,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:47,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:21:47,343 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-17 02:21:47,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:47,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131472639] [2020-09-17 02:21:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:47,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131472639] [2020-09-17 02:21:47,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279221513] [2020-09-17 02:21:47,427 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 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 [2020-09-17 02:21:47,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:47,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:47,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:47,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:47,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:47,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766732896] [2020-09-17 02:21:47,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:47,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:47,602 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-17 02:21:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:47,912 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-17 02:21:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:47,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:47,914 INFO L225 Difference]: With dead ends: 166 [2020-09-17 02:21:47,914 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:21:47,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:21:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:21:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-17 02:21:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-17 02:21:47,919 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-17 02:21:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:47,920 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-17 02:21:47,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-17 02:21:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:47,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:47,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:48,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:48,129 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-17 02:21:48,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:48,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676667275] [2020-09-17 02:21:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676667275] [2020-09-17 02:21:48,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178606882] [2020-09-17 02:21:48,207 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 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 [2020-09-17 02:21:48,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:48,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:48,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:48,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355959136] [2020-09-17 02:21:48,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:48,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:48,359 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-17 02:21:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:48,580 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-17 02:21:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:48,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:48,582 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:21:48,583 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:21:48,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:21:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-17 02:21:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-17 02:21:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-17 02:21:48,589 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-17 02:21:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:48,589 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-17 02:21:48,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-17 02:21:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:48,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:48,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:48,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-17 02:21:48,791 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-17 02:21:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:48,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391225088] [2020-09-17 02:21:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391225088] [2020-09-17 02:21:48,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646955110] [2020-09-17 02:21:48,870 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 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 [2020-09-17 02:21:48,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:49,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:49,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:49,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147545342] [2020-09-17 02:21:49,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:49,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:49,047 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:49,384 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-17 02:21:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:21:49,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:49,387 INFO L225 Difference]: With dead ends: 170 [2020-09-17 02:21:49,387 INFO L226 Difference]: Without dead ends: 168 [2020-09-17 02:21:49,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:21:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-17 02:21:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-17 02:21:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-17 02:21:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-17 02:21:49,391 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-17 02:21:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:49,392 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-17 02:21:49,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-17 02:21:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:49,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:49,393 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:49,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:49,604 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-17 02:21:49,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:49,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565003918] [2020-09-17 02:21:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:49,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565003918] [2020-09-17 02:21:49,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596649504] [2020-09-17 02:21:49,692 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 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 [2020-09-17 02:21:49,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:49,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:49,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:49,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:49,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:49,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775381132] [2020-09-17 02:21:49,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:49,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:49,839 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-17 02:21:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:50,193 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-17 02:21:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:50,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:50,195 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:21:50,195 INFO L226 Difference]: Without dead ends: 172 [2020-09-17 02:21:50,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:21:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-17 02:21:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-17 02:21:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-17 02:21:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-17 02:21:50,199 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-17 02:21:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:50,200 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-17 02:21:50,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-17 02:21:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:50,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:50,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:50,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-17 02:21:50,412 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:50,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-17 02:21:50,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:50,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813072765] [2020-09-17 02:21:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:50,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813072765] [2020-09-17 02:21:50,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417940743] [2020-09-17 02:21:50,498 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 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 [2020-09-17 02:21:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:50,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:50,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:50,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:50,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:50,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104095401] [2020-09-17 02:21:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:50,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:50,673 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-17 02:21:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:51,116 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-17 02:21:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:51,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:51,118 INFO L225 Difference]: With dead ends: 190 [2020-09-17 02:21:51,118 INFO L226 Difference]: Without dead ends: 182 [2020-09-17 02:21:51,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-17 02:21:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-17 02:21:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-17 02:21:51,122 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-17 02:21:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:51,122 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-17 02:21:51,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-17 02:21:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:51,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:51,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:21:51,333 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-17 02:21:51,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:51,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636068462] [2020-09-17 02:21:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:51,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636068462] [2020-09-17 02:21:51,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774966683] [2020-09-17 02:21:51,430 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 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 [2020-09-17 02:21:51,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:51,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:51,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:51,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:51,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142664024] [2020-09-17 02:21:51,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:51,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:51,597 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-17 02:21:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:52,001 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-17 02:21:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:52,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:52,004 INFO L225 Difference]: With dead ends: 180 [2020-09-17 02:21:52,004 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:21:52,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:21:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:21:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-17 02:21:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-17 02:21:52,007 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-17 02:21:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:52,007 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-17 02:21:52,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-17 02:21:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:52,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:52,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:52,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:52,211 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-17 02:21:52,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:52,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782387663] [2020-09-17 02:21:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:52,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782387663] [2020-09-17 02:21:52,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121865803] [2020-09-17 02:21:52,301 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 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 [2020-09-17 02:21:52,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:21:52,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:52,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:52,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:52,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:52,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985201090] [2020-09-17 02:21:52,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:52,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:52,477 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-17 02:21:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:52,716 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-17 02:21:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:52,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:52,718 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:21:52,719 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:21:52,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:21:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-17 02:21:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-17 02:21:52,722 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-17 02:21:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:52,722 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-17 02:21:52,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-17 02:21:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:52,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:52,723 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:52,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:21:52,924 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-17 02:21:52,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:52,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324706918] [2020-09-17 02:21:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324706918] [2020-09-17 02:21:53,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687210872] [2020-09-17 02:21:53,003 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 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 [2020-09-17 02:21:53,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:53,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:53,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103367583] [2020-09-17 02:21:53,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:53,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:53,167 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-17 02:21:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:53,401 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-17 02:21:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:53,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:53,403 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:21:53,403 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 02:21:53,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 02:21:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-17 02:21:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-17 02:21:53,406 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-17 02:21:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:53,406 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-17 02:21:53,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-17 02:21:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:53,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:53,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:53,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:21:53,610 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-17 02:21:53,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:53,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570654222] [2020-09-17 02:21:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570654222] [2020-09-17 02:21:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370163520] [2020-09-17 02:21:53,684 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 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 [2020-09-17 02:21:53,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:21:53,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:53,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:53,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:53,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:53,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041004226] [2020-09-17 02:21:53,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:53,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:53,886 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-17 02:21:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:54,360 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-17 02:21:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:54,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:54,362 INFO L225 Difference]: With dead ends: 175 [2020-09-17 02:21:54,362 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:21:54,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:21:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:21:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-17 02:21:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-17 02:21:54,368 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-17 02:21:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:54,368 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-17 02:21:54,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-17 02:21:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:54,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:54,369 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:54,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:21:54,570 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-17 02:21:54,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:54,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455801307] [2020-09-17 02:21:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:54,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455801307] [2020-09-17 02:21:54,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844904258] [2020-09-17 02:21:54,657 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 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 [2020-09-17 02:21:54,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:54,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:54,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:54,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550358771] [2020-09-17 02:21:54,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:54,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:54,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:54,815 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-17 02:21:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:55,197 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-17 02:21:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:55,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:55,200 INFO L225 Difference]: With dead ends: 162 [2020-09-17 02:21:55,200 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:21:55,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:21:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:21:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-17 02:21:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-17 02:21:55,204 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-17 02:21:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:55,204 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-17 02:21:55,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-17 02:21:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:55,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:55,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:55,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:55,414 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-17 02:21:55,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:55,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823954936] [2020-09-17 02:21:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:55,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823954936] [2020-09-17 02:21:55,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494877959] [2020-09-17 02:21:55,491 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 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 [2020-09-17 02:21:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:55,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:55,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:55,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200705445] [2020-09-17 02:21:55,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:55,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:55,657 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:56,136 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-17 02:21:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:56,137 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:56,138 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:21:56,138 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 02:21:56,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 02:21:56,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-17 02:21:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-17 02:21:56,142 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-17 02:21:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:56,142 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-17 02:21:56,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-17 02:21:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:56,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:56,143 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:56,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:56,354 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-17 02:21:56,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:56,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406996652] [2020-09-17 02:21:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:56,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406996652] [2020-09-17 02:21:56,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078734390] [2020-09-17 02:21:56,429 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 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 [2020-09-17 02:21:56,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:56,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:56,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:56,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:56,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5702058] [2020-09-17 02:21:56,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:56,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:56,594 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-17 02:21:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:57,031 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-17 02:21:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:57,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:57,034 INFO L225 Difference]: With dead ends: 165 [2020-09-17 02:21:57,034 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:21:57,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:21:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:21:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-17 02:21:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-17 02:21:57,037 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-17 02:21:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:57,037 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-17 02:21:57,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-17 02:21:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:57,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:57,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:57,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:57,239 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-17 02:21:57,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:57,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190391345] [2020-09-17 02:21:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:57,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190391345] [2020-09-17 02:21:57,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555759874] [2020-09-17 02:21:57,333 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 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 [2020-09-17 02:21:57,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:21:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:57,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:57,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:57,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373129058] [2020-09-17 02:21:57,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:57,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:57,533 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:58,202 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-17 02:21:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:21:58,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:58,204 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:21:58,204 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 02:21:58,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:21:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 02:21:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-17 02:21:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-17 02:21:58,208 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-17 02:21:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:58,208 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-17 02:21:58,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-17 02:21:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:58,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:58,209 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:58,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:58,419 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-17 02:21:58,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:58,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097525715] [2020-09-17 02:21:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:58,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097525715] [2020-09-17 02:21:58,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069323677] [2020-09-17 02:21:58,493 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 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 [2020-09-17 02:21:58,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:58,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:58,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:58,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:58,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441810139] [2020-09-17 02:21:58,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:58,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:58,656 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:59,099 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-17 02:21:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:21:59,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:59,101 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:21:59,101 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:21:59,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:21:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-17 02:21:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-17 02:21:59,105 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-17 02:21:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:59,106 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-17 02:21:59,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-17 02:21:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:59,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:59,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:59,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:21:59,316 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-17 02:21:59,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:59,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058041264] [2020-09-17 02:21:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:59,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058041264] [2020-09-17 02:21:59,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005145356] [2020-09-17 02:21:59,409 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 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 [2020-09-17 02:21:59,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:59,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:59,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:59,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:59,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441885114] [2020-09-17 02:21:59,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:59,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:59,567 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-17 02:22:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:00,151 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-17 02:22:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:00,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:22:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:00,153 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:00,153 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:00,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-17 02:22:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 02:22:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-17 02:22:00,158 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-17 02:22:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:00,159 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-17 02:22:00,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:22:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-17 02:22:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:00,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:00,160 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:00,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:00,370 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-17 02:22:00,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:00,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609012007] [2020-09-17 02:22:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:00,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609012007] [2020-09-17 02:22:00,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790799457] [2020-09-17 02:22:00,454 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 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 [2020-09-17 02:22:00,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:22:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:00,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:00,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:00,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:22:00,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828775532] [2020-09-17 02:22:00,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:22:00,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:22:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:22:00,592 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-17 02:22:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:01,192 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-17 02:22:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:01,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:22:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:01,195 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:22:01,195 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:22:01,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:22:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-17 02:22:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 02:22:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-17 02:22:01,201 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-17 02:22:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:01,201 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-17 02:22:01,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:22:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-17 02:22:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:01,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:01,202 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:01,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:22:01,406 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-17 02:22:01,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:01,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058787936] [2020-09-17 02:22:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:01,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058787936] [2020-09-17 02:22:01,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535303494] [2020-09-17 02:22:01,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:22:01,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:22:01,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:01,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:01,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:01,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:01,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-17 02:22:01,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311087103] [2020-09-17 02:22:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:22:01,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:22:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:22:01,709 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-17 02:22:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:01,880 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-17 02:22:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:01,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-17 02:22:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:01,882 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:22:01,882 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:22:01,883 INFO L675 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 [2020-09-17 02:22:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:22:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-17 02:22:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:22:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-17 02:22:01,887 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-17 02:22:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:01,887 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-17 02:22:01,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:22:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-17 02:22:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:01,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:01,888 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:02,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:02,090 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-17 02:22:02,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:02,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017826578] [2020-09-17 02:22:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:02,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017826578] [2020-09-17 02:22:02,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991441996] [2020-09-17 02:22:02,182 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 [2020-09-17 02:22:02,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:02,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:02,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:02,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:02,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080363905] [2020-09-17 02:22:02,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:02,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:02,368 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-17 02:22:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:02,548 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-17 02:22:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:02,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:02,550 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:22:02,550 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:22:02,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:22:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-17 02:22:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-17 02:22:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-17 02:22:02,554 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-17 02:22:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:02,555 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-17 02:22:02,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-17 02:22:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:02,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:02,555 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:02,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:22:02,756 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-17 02:22:02,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:02,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755310789] [2020-09-17 02:22:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:02,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755310789] [2020-09-17 02:22:02,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928543391] [2020-09-17 02:22:02,866 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 [2020-09-17 02:22:02,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:02,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:03,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:03,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060722075] [2020-09-17 02:22:03,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:03,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:03,093 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-17 02:22:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:03,358 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-17 02:22:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:03,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:03,361 INFO L225 Difference]: With dead ends: 172 [2020-09-17 02:22:03,361 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 02:22:03,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:22:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 02:22:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-17 02:22:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-17 02:22:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-17 02:22:03,364 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-17 02:22:03,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:03,365 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-17 02:22:03,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-17 02:22:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:03,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:03,365 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:03,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:03,567 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-17 02:22:03,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:03,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015630903] [2020-09-17 02:22:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015630903] [2020-09-17 02:22:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942025802] [2020-09-17 02:22:03,669 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 [2020-09-17 02:22:03,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:22:03,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:03,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:03,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:03,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151234322] [2020-09-17 02:22:03,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:03,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:03,882 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-17 02:22:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:04,214 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-17 02:22:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:22:04,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:04,216 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:04,217 INFO L226 Difference]: Without dead ends: 174 [2020-09-17 02:22:04,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:22:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-17 02:22:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-17 02:22:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 02:22:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-17 02:22:04,221 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-17 02:22:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:04,223 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-17 02:22:04,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-17 02:22:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:04,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:04,224 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:04,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:04,435 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-17 02:22:04,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:04,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808942012] [2020-09-17 02:22:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:04,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808942012] [2020-09-17 02:22:04,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931725037] [2020-09-17 02:22:04,534 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 [2020-09-17 02:22:04,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:04,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:04,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:04,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:04,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596959206] [2020-09-17 02:22:04,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:04,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:04,708 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-17 02:22:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:05,064 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-17 02:22:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:22:05,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:05,066 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:22:05,066 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:05,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-17 02:22:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-17 02:22:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-17 02:22:05,069 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-17 02:22:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:05,070 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-17 02:22:05,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-17 02:22:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:05,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:05,071 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:05,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-17 02:22:05,279 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-17 02:22:05,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:05,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985002755] [2020-09-17 02:22:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:05,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985002755] [2020-09-17 02:22:05,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661427349] [2020-09-17 02:22:05,381 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 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 [2020-09-17 02:22:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:05,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:05,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:05,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248113206] [2020-09-17 02:22:05,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:05,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:05,561 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-17 02:22:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:05,869 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-17 02:22:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:05,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:05,871 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:22:05,871 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:22:05,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:22:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-17 02:22:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-17 02:22:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-17 02:22:05,877 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-17 02:22:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:05,877 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-17 02:22:05,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-17 02:22:05,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:05,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:05,879 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:06,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:06,079 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-17 02:22:06,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:06,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554773336] [2020-09-17 02:22:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:06,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554773336] [2020-09-17 02:22:06,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433618845] [2020-09-17 02:22:06,206 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 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 [2020-09-17 02:22:06,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:06,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:06,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:06,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:06,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988748629] [2020-09-17 02:22:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:06,353 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-17 02:22:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:06,723 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-17 02:22:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:06,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:06,725 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:22:06,725 INFO L226 Difference]: Without dead ends: 170 [2020-09-17 02:22:06,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-17 02:22:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-17 02:22:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-17 02:22:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-17 02:22:06,728 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-17 02:22:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:06,729 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-17 02:22:06,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-17 02:22:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:06,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:06,729 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:06,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:06,930 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-17 02:22:06,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:06,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368992975] [2020-09-17 02:22:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368992975] [2020-09-17 02:22:07,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37105415] [2020-09-17 02:22:07,029 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 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 [2020-09-17 02:22:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:07,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:07,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102564255] [2020-09-17 02:22:07,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:07,231 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-17 02:22:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:07,306 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-17 02:22:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:22:07,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:07,309 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:22:07,309 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:22:07,309 INFO L675 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 [2020-09-17 02:22:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:22:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-17 02:22:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-17 02:22:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-17 02:22:07,312 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-17 02:22:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:07,312 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-17 02:22:07,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-17 02:22:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:07,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:07,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:07,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:22:07,514 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-17 02:22:07,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:07,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205430492] [2020-09-17 02:22:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205430492] [2020-09-17 02:22:07,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35833157] [2020-09-17 02:22:07,613 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 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 [2020-09-17 02:22:07,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:07,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:07,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:07,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507082630] [2020-09-17 02:22:07,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:07,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:07,820 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:07,914 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-17 02:22:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:22:07,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:07,916 INFO L225 Difference]: With dead ends: 172 [2020-09-17 02:22:07,917 INFO L226 Difference]: Without dead ends: 170 [2020-09-17 02:22:07,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:22:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-17 02:22:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-17 02:22:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-17 02:22:07,922 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-17 02:22:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:07,923 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-17 02:22:07,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-17 02:22:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:07,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:08,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:08,126 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-17 02:22:08,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:08,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091119927] [2020-09-17 02:22:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:08,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091119927] [2020-09-17 02:22:08,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253346945] [2020-09-17 02:22:08,259 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 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 [2020-09-17 02:22:08,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:08,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:09,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:09,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:09,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758861731] [2020-09-17 02:22:09,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:09,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:09,285 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-17 02:22:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:09,481 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-17 02:22:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:09,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:09,483 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:09,483 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:09,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:22:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-17 02:22:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-17 02:22:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-17 02:22:09,491 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-17 02:22:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:09,491 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-17 02:22:09,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-17 02:22:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:09,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:09,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:09,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:22:09,701 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-17 02:22:09,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:09,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620052762] [2020-09-17 02:22:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620052762] [2020-09-17 02:22:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759253603] [2020-09-17 02:22:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:22:09,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:09,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:09,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:10,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485891260] [2020-09-17 02:22:10,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:10,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:10,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:10,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:10,008 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-17 02:22:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:10,222 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-17 02:22:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:10,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:10,224 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:10,224 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:10,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-17 02:22:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-17 02:22:10,228 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-17 02:22:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:10,229 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-17 02:22:10,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-17 02:22:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:10,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:10,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:10,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-17 02:22:10,430 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-17 02:22:10,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:10,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596854600] [2020-09-17 02:22:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:10,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596854600] [2020-09-17 02:22:10,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181884276] [2020-09-17 02:22:10,537 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 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 [2020-09-17 02:22:10,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:10,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:10,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:10,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173072254] [2020-09-17 02:22:10,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:10,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:10,734 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-17 02:22:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:10,944 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-17 02:22:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:10,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:10,947 INFO L225 Difference]: With dead ends: 184 [2020-09-17 02:22:10,947 INFO L226 Difference]: Without dead ends: 182 [2020-09-17 02:22:10,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-17 02:22:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-17 02:22:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-17 02:22:10,952 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-17 02:22:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:10,953 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-17 02:22:10,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-17 02:22:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:10,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:10,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:11,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:22:11,166 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-17 02:22:11,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:11,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326504428] [2020-09-17 02:22:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:11,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326504428] [2020-09-17 02:22:11,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588048676] [2020-09-17 02:22:11,292 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 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 [2020-09-17 02:22:11,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:11,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:11,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:11,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120557656] [2020-09-17 02:22:11,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:11,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:11,539 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-17 02:22:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:11,841 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-17 02:22:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:11,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:11,844 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:11,844 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:11,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-17 02:22:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-17 02:22:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-17 02:22:11,850 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-17 02:22:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-17 02:22:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-17 02:22:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:11,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:11,852 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:12,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:12,065 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-17 02:22:12,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:12,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876883317] [2020-09-17 02:22:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:12,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876883317] [2020-09-17 02:22:12,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583161157] [2020-09-17 02:22:12,160 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 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 [2020-09-17 02:22:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:12,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:12,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:12,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:12,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098343206] [2020-09-17 02:22:12,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:12,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:12,367 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-17 02:22:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:12,678 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-17 02:22:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:12,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:12,681 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:12,681 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:22:12,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:22:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:22:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-17 02:22:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:22:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-17 02:22:12,685 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-17 02:22:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:12,685 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-17 02:22:12,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-17 02:22:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:12,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:12,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:12,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:12,887 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-17 02:22:12,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:12,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059668019] [2020-09-17 02:22:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:12,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059668019] [2020-09-17 02:22:12,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984241931] [2020-09-17 02:22:12,989 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 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 [2020-09-17 02:22:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:13,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:13,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:13,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:13,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983958934] [2020-09-17 02:22:13,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:13,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:13,182 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:13,492 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-17 02:22:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:13,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:13,494 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:13,494 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:13,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:22:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-17 02:22:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-17 02:22:13,498 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-17 02:22:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:13,498 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-17 02:22:13,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-17 02:22:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:13,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:13,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:13,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:13,699 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-17 02:22:13,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:13,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137670220] [2020-09-17 02:22:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137670220] [2020-09-17 02:22:13,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80541382] [2020-09-17 02:22:13,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:22:13,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:13,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:13,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:13,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261242595] [2020-09-17 02:22:13,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:13,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:13,990 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-17 02:22:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:14,263 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-17 02:22:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:14,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:14,266 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:14,266 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 02:22:14,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:22:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 02:22:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-17 02:22:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-17 02:22:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-17 02:22:14,269 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-17 02:22:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:14,269 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-17 02:22:14,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-17 02:22:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:14,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:14,270 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:14,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:14,471 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-17 02:22:14,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:14,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046470871] [2020-09-17 02:22:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:14,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046470871] [2020-09-17 02:22:14,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290267630] [2020-09-17 02:22:14,635 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 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 [2020-09-17 02:22:14,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:14,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:14,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:14,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:14,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508193888] [2020-09-17 02:22:14,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:14,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:14,831 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-17 02:22:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:14,923 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-17 02:22:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:22:14,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:14,925 INFO L225 Difference]: With dead ends: 182 [2020-09-17 02:22:14,925 INFO L226 Difference]: Without dead ends: 180 [2020-09-17 02:22:14,926 INFO L675 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 [2020-09-17 02:22:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-17 02:22:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-17 02:22:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:22:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-17 02:22:14,929 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-17 02:22:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:14,929 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-17 02:22:14,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-17 02:22:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:14,930 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-17 02:22:15,139 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-17 02:22:15,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104296910] [2020-09-17 02:22:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104296910] [2020-09-17 02:22:15,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870227385] [2020-09-17 02:22:15,290 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 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 [2020-09-17 02:22:15,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:15,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:15,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448664127] [2020-09-17 02:22:15,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:15,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:15,492 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-17 02:22:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:15,600 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-17 02:22:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:15,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:15,602 INFO L225 Difference]: With dead ends: 185 [2020-09-17 02:22:15,603 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 02:22:15,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 02:22:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-17 02:22:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-17 02:22:15,607 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-17 02:22:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:15,608 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-17 02:22:15,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-17 02:22:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:15,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:15,609 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:15,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:15,810 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-17 02:22:15,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:15,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444134649] [2020-09-17 02:22:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444134649] [2020-09-17 02:22:15,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432840161] [2020-09-17 02:22:15,939 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 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 [2020-09-17 02:22:15,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:15,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:15,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:15,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:16,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:16,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:16,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524650000] [2020-09-17 02:22:16,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:16,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:16,680 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:16,887 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-17 02:22:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:16,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:16,889 INFO L225 Difference]: With dead ends: 191 [2020-09-17 02:22:16,889 INFO L226 Difference]: Without dead ends: 189 [2020-09-17 02:22:16,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-17 02:22:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-17 02:22:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-17 02:22:16,894 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-17 02:22:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:16,894 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-17 02:22:16,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-17 02:22:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:16,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:16,895 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:17,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:17,105 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-17 02:22:17,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:17,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850248535] [2020-09-17 02:22:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850248535] [2020-09-17 02:22:17,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845074852] [2020-09-17 02:22:17,215 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 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 [2020-09-17 02:22:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:17,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:17,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967195074] [2020-09-17 02:22:17,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:17,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:17,419 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:17,660 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-17 02:22:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:17,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:17,662 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:17,662 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:17,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-17 02:22:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-17 02:22:17,666 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-17 02:22:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:17,667 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-17 02:22:17,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-17 02:22:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:17,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:17,668 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:17,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:17,875 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-17 02:22:17,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:17,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814664020] [2020-09-17 02:22:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814664020] [2020-09-17 02:22:17,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525155378] [2020-09-17 02:22:17,993 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 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 [2020-09-17 02:22:18,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:18,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:18,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:18,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876563392] [2020-09-17 02:22:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:18,196 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:18,436 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-17 02:22:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:18,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:18,439 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:22:18,439 INFO L226 Difference]: Without dead ends: 192 [2020-09-17 02:22:18,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-17 02:22:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-17 02:22:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-17 02:22:18,443 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-17 02:22:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:18,443 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-17 02:22:18,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-17 02:22:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:18,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:18,444 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:18,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:18,645 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-17 02:22:18,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:18,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422705872] [2020-09-17 02:22:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422705872] [2020-09-17 02:22:18,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559179220] [2020-09-17 02:22:18,759 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 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 [2020-09-17 02:22:18,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:18,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:18,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542082438] [2020-09-17 02:22:18,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:18,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:18,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:18,973 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-17 02:22:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:19,243 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-17 02:22:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:19,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:19,248 INFO L225 Difference]: With dead ends: 186 [2020-09-17 02:22:19,248 INFO L226 Difference]: Without dead ends: 184 [2020-09-17 02:22:19,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-17 02:22:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-17 02:22:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:22:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-17 02:22:19,252 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-17 02:22:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:19,252 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-17 02:22:19,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-17 02:22:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:19,253 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:19,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:22:19,454 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-17 02:22:19,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:19,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068878590] [2020-09-17 02:22:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:19,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068878590] [2020-09-17 02:22:19,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114553480] [2020-09-17 02:22:19,613 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 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 [2020-09-17 02:22:19,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:19,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:19,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:19,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:19,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664719143] [2020-09-17 02:22:19,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:19,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:19,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:19,814 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-17 02:22:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:19,910 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-17 02:22:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:19,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:19,912 INFO L225 Difference]: With dead ends: 178 [2020-09-17 02:22:19,913 INFO L226 Difference]: Without dead ends: 176 [2020-09-17 02:22:19,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-17 02:22:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-17 02:22:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-17 02:22:19,916 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-17 02:22:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:19,916 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-17 02:22:19,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-17 02:22:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:19,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:19,917 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:20,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-17 02:22:20,118 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-17 02:22:20,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:20,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7568108] [2020-09-17 02:22:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7568108] [2020-09-17 02:22:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005552481] [2020-09-17 02:22:20,251 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 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 [2020-09-17 02:22:20,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:20,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:20,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:20,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351536358] [2020-09-17 02:22:20,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:20,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:20,438 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-17 02:22:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:20,578 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-17 02:22:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:20,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:20,580 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:20,580 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 02:22:20,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:22:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 02:22:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-17 02:22:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-17 02:22:20,584 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-17 02:22:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:20,584 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-17 02:22:20,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-17 02:22:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:20,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:20,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:20,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:20,786 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-17 02:22:20,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:20,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325083061] [2020-09-17 02:22:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:20,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325083061] [2020-09-17 02:22:20,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735885895] [2020-09-17 02:22:20,895 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 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 [2020-09-17 02:22:20,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:20,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:21,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:21,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910947649] [2020-09-17 02:22:21,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:21,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:21,128 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-17 02:22:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:21,350 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-17 02:22:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:21,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:21,351 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:21,352 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:21,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-17 02:22:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-17 02:22:21,355 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-17 02:22:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:21,356 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-17 02:22:21,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-17 02:22:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:21,356 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:21,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:21,557 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-17 02:22:21,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:21,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986180925] [2020-09-17 02:22:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986180925] [2020-09-17 02:22:21,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709115593] [2020-09-17 02:22:21,690 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 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 [2020-09-17 02:22:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:21,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:21,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433296776] [2020-09-17 02:22:21,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:21,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:21,876 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-17 02:22:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:22,019 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-17 02:22:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:22,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:22,021 INFO L225 Difference]: With dead ends: 174 [2020-09-17 02:22:22,022 INFO L226 Difference]: Without dead ends: 172 [2020-09-17 02:22:22,022 INFO L675 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 [2020-09-17 02:22:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-17 02:22:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-17 02:22:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-17 02:22:22,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-17 02:22:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:22,025 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-17 02:22:22,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-17 02:22:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:22,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:22,025 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:22,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:22,226 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-17 02:22:22,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:22,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211844524] [2020-09-17 02:22:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:22,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211844524] [2020-09-17 02:22:22,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976997608] [2020-09-17 02:22:22,343 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 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 [2020-09-17 02:22:22,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:22,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:22,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:22,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168765409] [2020-09-17 02:22:22,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:22,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:22,553 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-17 02:22:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:22,721 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-17 02:22:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:22,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:22,723 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:22,723 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:22:22,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:22:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-17 02:22:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-17 02:22:22,726 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-17 02:22:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:22,726 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-17 02:22:22,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-17 02:22:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:22,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:22,727 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:22,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:22,928 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:22,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-17 02:22:22,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:22,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642036616] [2020-09-17 02:22:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642036616] [2020-09-17 02:22:23,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289820951] [2020-09-17 02:22:23,051 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 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 [2020-09-17 02:22:23,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:23,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:23,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742530419] [2020-09-17 02:22:23,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:23,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:23,261 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:23,463 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-17 02:22:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:23,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:23,466 INFO L225 Difference]: With dead ends: 175 [2020-09-17 02:22:23,466 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:23,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-17 02:22:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:23,470 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:23,470 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:23,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:23,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:23,471 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:23,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:23,682 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-17 02:22:23,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:23,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48749742] [2020-09-17 02:22:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48749742] [2020-09-17 02:22:23,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057067115] [2020-09-17 02:22:23,784 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 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 [2020-09-17 02:22:23,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:23,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:24,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:24,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:24,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127954194] [2020-09-17 02:22:24,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:24,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:24,003 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:24,434 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-17 02:22:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:24,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:24,436 INFO L225 Difference]: With dead ends: 195 [2020-09-17 02:22:24,436 INFO L226 Difference]: Without dead ends: 190 [2020-09-17 02:22:24,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-17 02:22:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-17 02:22:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-17 02:22:24,439 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-17 02:22:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:24,439 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-17 02:22:24,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-17 02:22:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:24,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:24,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:24,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:24,641 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-17 02:22:24,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:24,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875989549] [2020-09-17 02:22:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:24,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875989549] [2020-09-17 02:22:24,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28435205] [2020-09-17 02:22:24,734 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 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 [2020-09-17 02:22:24,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:24,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:24,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:24,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:24,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988338060] [2020-09-17 02:22:24,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:24,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:24,942 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:25,276 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-17 02:22:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:25,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:25,278 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:25,279 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:25,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-17 02:22:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:25,283 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:25,284 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:25,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:25,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:25,285 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:25,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:25,497 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-17 02:22:25,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:25,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078826901] [2020-09-17 02:22:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:25,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078826901] [2020-09-17 02:22:25,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897986475] [2020-09-17 02:22:25,605 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 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 [2020-09-17 02:22:25,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:25,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:25,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:25,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:25,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084167056] [2020-09-17 02:22:25,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:25,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:25,844 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:26,412 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-17 02:22:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:22:26,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:26,414 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:22:26,414 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:22:26,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:22:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-17 02:22:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:26,417 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:26,417 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:26,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:26,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:26,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:26,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:22:26,629 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-17 02:22:26,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:26,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041271331] [2020-09-17 02:22:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:26,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041271331] [2020-09-17 02:22:26,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434750092] [2020-09-17 02:22:26,734 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 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 [2020-09-17 02:22:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:26,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:26,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:26,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:26,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653992742] [2020-09-17 02:22:26,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:26,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:26,931 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:27,354 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:22:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:27,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:27,357 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:22:27,357 INFO L226 Difference]: Without dead ends: 197 [2020-09-17 02:22:27,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-17 02:22:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-17 02:22:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-17 02:22:27,360 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-17 02:22:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:27,360 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-17 02:22:27,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-17 02:22:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:27,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:27,361 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:27,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:27,562 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:27,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-17 02:22:27,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:27,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294644057] [2020-09-17 02:22:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:27,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294644057] [2020-09-17 02:22:27,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204245724] [2020-09-17 02:22:27,651 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 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 [2020-09-17 02:22:27,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:27,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:27,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:28,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:28,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:28,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711113852] [2020-09-17 02:22:28,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:28,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:28,408 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-17 02:22:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:28,791 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-17 02:22:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:28,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:28,794 INFO L225 Difference]: With dead ends: 198 [2020-09-17 02:22:28,794 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 02:22:28,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 02:22:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-17 02:22:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-17 02:22:28,798 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-17 02:22:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:28,798 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-17 02:22:28,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-17 02:22:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:28,799 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:28,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-17 02:22:28,999 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-17 02:22:29,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:29,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596280555] [2020-09-17 02:22:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:29,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596280555] [2020-09-17 02:22:29,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9560351] [2020-09-17 02:22:29,107 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 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 [2020-09-17 02:22:29,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:29,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:29,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:29,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289321304] [2020-09-17 02:22:29,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:29,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:29,363 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:29,903 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-17 02:22:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:22:29,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:29,906 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:22:29,906 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:22:29,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:22:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:22:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-17 02:22:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:29,911 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:29,911 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:29,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:29,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:29,912 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:30,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:30,118 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-17 02:22:30,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:30,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131042270] [2020-09-17 02:22:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131042270] [2020-09-17 02:22:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900978197] [2020-09-17 02:22:30,231 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 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 [2020-09-17 02:22:30,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:30,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:30,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:30,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:30,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:30,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220933935] [2020-09-17 02:22:30,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:30,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:30,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:30,466 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:31,171 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-17 02:22:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:31,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:31,174 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:22:31,174 INFO L226 Difference]: Without dead ends: 212 [2020-09-17 02:22:31,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-17 02:22:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-17 02:22:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:22:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-17 02:22:31,178 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-17 02:22:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:31,178 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-17 02:22:31,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-17 02:22:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:31,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:31,179 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:31,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:22:31,381 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-17 02:22:31,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:31,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605990600] [2020-09-17 02:22:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:31,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605990600] [2020-09-17 02:22:31,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321794884] [2020-09-17 02:22:31,482 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 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 [2020-09-17 02:22:31,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:31,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:31,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:33,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:33,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:33,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:33,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885173286] [2020-09-17 02:22:33,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:33,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-17 02:22:33,794 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-17 02:22:38,190 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:22:42,447 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-17 02:22:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:42,957 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-17 02:22:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:22:42,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:42,958 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:22:42,958 INFO L226 Difference]: Without dead ends: 228 [2020-09-17 02:22:42,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-17 02:22:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-17 02:22:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-17 02:22:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-17 02:22:42,962 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-17 02:22:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:42,963 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-17 02:22:42,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-17 02:22:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:42,964 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:43,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-17 02:22:43,173 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-17 02:22:43,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:43,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322176214] [2020-09-17 02:22:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:43,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322176214] [2020-09-17 02:22:43,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521601960] [2020-09-17 02:22:43,281 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 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 [2020-09-17 02:22:43,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:43,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:43,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:43,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:43,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:43,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:43,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794688738] [2020-09-17 02:22:43,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:43,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:43,523 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-17 02:22:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:44,213 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-17 02:22:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:44,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:44,215 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:22:44,215 INFO L226 Difference]: Without dead ends: 214 [2020-09-17 02:22:44,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:22:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-17 02:22:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-17 02:22:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-17 02:22:44,219 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-17 02:22:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:44,219 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-17 02:22:44,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-17 02:22:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:44,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:44,220 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:44,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:22:44,420 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-17 02:22:44,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:44,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546941377] [2020-09-17 02:22:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:44,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546941377] [2020-09-17 02:22:44,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851020833] [2020-09-17 02:22:44,529 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 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 [2020-09-17 02:22:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:44,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:44,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:44,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982517029] [2020-09-17 02:22:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:44,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:44,720 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-17 02:22:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:45,076 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-17 02:22:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:45,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:45,078 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:22:45,078 INFO L226 Difference]: Without dead ends: 195 [2020-09-17 02:22:45,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-17 02:22:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-17 02:22:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-17 02:22:45,083 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-17 02:22:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:45,083 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-17 02:22:45,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-17 02:22:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:45,084 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:45,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:45,288 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-17 02:22:45,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:45,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102503428] [2020-09-17 02:22:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:45,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102503428] [2020-09-17 02:22:45,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827865915] [2020-09-17 02:22:45,392 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 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 [2020-09-17 02:22:45,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:45,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:45,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:45,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121753272] [2020-09-17 02:22:45,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:45,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:45,578 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-17 02:22:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:45,938 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-17 02:22:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:45,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:45,940 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:22:45,940 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:22:45,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:22:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-17 02:22:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-17 02:22:45,944 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-17 02:22:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:45,944 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-17 02:22:45,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-17 02:22:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:45,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:45,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:46,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:22:46,146 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-17 02:22:46,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:46,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105768952] [2020-09-17 02:22:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:46,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105768952] [2020-09-17 02:22:46,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533074829] [2020-09-17 02:22:46,241 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 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 [2020-09-17 02:22:46,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:46,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:46,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:46,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778581179] [2020-09-17 02:22:46,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:46,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:46,456 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:46,830 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-17 02:22:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:46,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:46,832 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:22:46,832 INFO L226 Difference]: Without dead ends: 195 [2020-09-17 02:22:46,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-17 02:22:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-17 02:22:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-17 02:22:46,837 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-17 02:22:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:46,837 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-17 02:22:46,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-17 02:22:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:46,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:46,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:47,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:47,046 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:47,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-17 02:22:47,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:47,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287021816] [2020-09-17 02:22:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:47,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287021816] [2020-09-17 02:22:47,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853795731] [2020-09-17 02:22:47,142 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 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 [2020-09-17 02:22:47,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:47,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:47,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:47,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958190061] [2020-09-17 02:22:47,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:47,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:47,400 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-17 02:22:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:48,059 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-17 02:22:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:22:48,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:48,060 INFO L225 Difference]: With dead ends: 214 [2020-09-17 02:22:48,060 INFO L226 Difference]: Without dead ends: 212 [2020-09-17 02:22:48,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-17 02:22:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-17 02:22:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:22:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-17 02:22:48,065 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-17 02:22:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:48,065 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-17 02:22:48,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-17 02:22:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:48,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:48,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:48,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:22:48,275 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-17 02:22:48,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:48,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122937830] [2020-09-17 02:22:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:48,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122937830] [2020-09-17 02:22:48,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727934146] [2020-09-17 02:22:48,413 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 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 [2020-09-17 02:22:48,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:48,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:48,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:48,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:48,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718871524] [2020-09-17 02:22:48,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:48,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:48,659 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-17 02:22:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:49,155 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-17 02:22:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:49,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:49,157 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:22:49,157 INFO L226 Difference]: Without dead ends: 215 [2020-09-17 02:22:49,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:22:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-17 02:22:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-17 02:22:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-17 02:22:49,164 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-17 02:22:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:49,164 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-17 02:22:49,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-17 02:22:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:49,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:49,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:49,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:49,377 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-17 02:22:49,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:49,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830752553] [2020-09-17 02:22:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:49,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830752553] [2020-09-17 02:22:49,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641819154] [2020-09-17 02:22:49,483 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 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 [2020-09-17 02:22:49,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:49,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:49,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:49,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:49,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096376844] [2020-09-17 02:22:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:49,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:49,687 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-17 02:22:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:50,197 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-17 02:22:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:22:50,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:50,199 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:22:50,199 INFO L226 Difference]: Without dead ends: 209 [2020-09-17 02:22:50,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-17 02:22:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-17 02:22:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:50,202 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:50,202 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:50,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:50,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:50,203 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:50,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:50,404 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-17 02:22:50,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:50,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161371565] [2020-09-17 02:22:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:50,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161371565] [2020-09-17 02:22:50,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068530691] [2020-09-17 02:22:50,513 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 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 [2020-09-17 02:22:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:50,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:50,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:50,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:50,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948185842] [2020-09-17 02:22:50,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:50,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:50,699 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:51,303 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-17 02:22:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:22:51,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:51,305 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:22:51,305 INFO L226 Difference]: Without dead ends: 206 [2020-09-17 02:22:51,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:22:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-17 02:22:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-17 02:22:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:51,308 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:51,308 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:51,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:51,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:51,309 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:51,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-17 02:22:51,510 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-17 02:22:51,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:51,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639826802] [2020-09-17 02:22:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:51,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639826802] [2020-09-17 02:22:51,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752045266] [2020-09-17 02:22:51,622 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 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 [2020-09-17 02:22:51,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:51,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:51,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:51,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:51,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833372036] [2020-09-17 02:22:51,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:51,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:51,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:51,845 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:52,603 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-17 02:22:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:52,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:52,605 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:22:52,605 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:22:52,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:22:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:22:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-17 02:22:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-17 02:22:52,609 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-17 02:22:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:52,609 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-17 02:22:52,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-17 02:22:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:52,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:52,610 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:52,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:22:52,810 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-17 02:22:52,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:52,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787388413] [2020-09-17 02:22:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787388413] [2020-09-17 02:22:52,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896828251] [2020-09-17 02:22:52,922 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 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 [2020-09-17 02:22:52,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:53,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:53,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:53,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956269269] [2020-09-17 02:22:53,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:53,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:53,132 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-17 02:22:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:53,774 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-17 02:22:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:22:53,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:53,776 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:22:53,776 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:22:53,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:22:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:22:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-17 02:22:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:53,781 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:53,781 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:53,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:53,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:53,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:53,983 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-17 02:22:53,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:53,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198989754] [2020-09-17 02:22:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:54,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198989754] [2020-09-17 02:22:54,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535712623] [2020-09-17 02:22:54,102 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 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 [2020-09-17 02:22:54,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:54,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:54,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:54,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:54,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:54,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577231996] [2020-09-17 02:22:54,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:54,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:54,300 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:55,072 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-17 02:22:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:22:55,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:55,074 INFO L225 Difference]: With dead ends: 240 [2020-09-17 02:22:55,074 INFO L226 Difference]: Without dead ends: 232 [2020-09-17 02:22:55,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:22:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-17 02:22:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-17 02:22:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:22:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-17 02:22:55,079 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-17 02:22:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:55,079 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-17 02:22:55,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-17 02:22:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:55,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:55,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:55,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:22:55,289 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-17 02:22:55,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:55,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454792672] [2020-09-17 02:22:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:55,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454792672] [2020-09-17 02:22:55,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219955444] [2020-09-17 02:22:55,413 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 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 [2020-09-17 02:22:55,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:55,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:55,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:55,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:55,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:55,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:55,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107694696] [2020-09-17 02:22:55,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:55,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:55,604 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-17 02:22:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:56,367 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-17 02:22:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:22:56,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:56,369 INFO L225 Difference]: With dead ends: 238 [2020-09-17 02:22:56,369 INFO L226 Difference]: Without dead ends: 230 [2020-09-17 02:22:56,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:22:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-17 02:22:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-17 02:22:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-17 02:22:56,373 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-17 02:22:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:56,373 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-17 02:22:56,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-17 02:22:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:56,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:56,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:56,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:22:56,584 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-17 02:22:56,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:56,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030417772] [2020-09-17 02:22:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030417772] [2020-09-17 02:22:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271144447] [2020-09-17 02:22:56,697 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 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 [2020-09-17 02:22:56,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:56,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:56,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:56,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169589901] [2020-09-17 02:22:56,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:56,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:56,917 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-17 02:22:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:57,284 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-17 02:22:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:57,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:57,286 INFO L225 Difference]: With dead ends: 195 [2020-09-17 02:22:57,286 INFO L226 Difference]: Without dead ends: 193 [2020-09-17 02:22:57,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-17 02:22:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-17 02:22:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-17 02:22:57,290 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-17 02:22:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:57,290 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-17 02:22:57,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-17 02:22:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:57,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:57,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:57,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:22:57,491 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:57,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-17 02:22:57,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:57,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101514584] [2020-09-17 02:22:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:57,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101514584] [2020-09-17 02:22:57,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536075907] [2020-09-17 02:22:57,613 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 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 [2020-09-17 02:22:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:57,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:57,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378542843] [2020-09-17 02:22:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:57,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:57,830 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-17 02:22:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:58,461 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-17 02:22:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:58,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:58,463 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:22:58,463 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:22:58,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:22:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-17 02:22:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-17 02:22:58,466 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-17 02:22:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:58,467 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-17 02:22:58,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-17 02:22:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:58,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:58,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:58,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:58,668 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:58,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-17 02:22:58,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:58,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312788420] [2020-09-17 02:22:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:58,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312788420] [2020-09-17 02:22:58,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183292163] [2020-09-17 02:22:58,782 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 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 [2020-09-17 02:22:58,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:58,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:58,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:23:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:23:00,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:23:00,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-17 02:23:00,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454620002] [2020-09-17 02:23:00,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:23:00,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:23:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:23:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-17 02:23:00,202 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-17 02:23:02,754 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-17 02:23:22,956 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-17 02:23:55,769 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-17 02:24:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:20,824 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-17 02:24:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:24:20,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-17 02:24:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:20,826 INFO L225 Difference]: With dead ends: 242 [2020-09-17 02:24:20,827 INFO L226 Difference]: Without dead ends: 237 [2020-09-17 02:24:20,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-17 02:24:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-17 02:24:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-17 02:24:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-17 02:24:20,830 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-17 02:24:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:20,831 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-17 02:24:20,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:24:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-17 02:24:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:20,832 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:21,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:24:21,036 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-17 02:24:21,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:21,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476498289] [2020-09-17 02:24:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:21,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476498289] [2020-09-17 02:24:21,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009285164] [2020-09-17 02:24:21,150 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 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 [2020-09-17 02:24:21,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:21,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:21,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:21,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424803782] [2020-09-17 02:24:21,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:21,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:21,383 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-17 02:24:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:21,787 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-17 02:24:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:21,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:21,788 INFO L225 Difference]: With dead ends: 192 [2020-09-17 02:24:21,789 INFO L226 Difference]: Without dead ends: 190 [2020-09-17 02:24:21,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-17 02:24:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-17 02:24:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:24:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-17 02:24:21,792 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-17 02:24:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:21,793 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-17 02:24:21,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-17 02:24:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:21,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:21,793 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:21,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-17 02:24:21,994 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-17 02:24:21,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:21,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794190501] [2020-09-17 02:24:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:22,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794190501] [2020-09-17 02:24:22,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397322156] [2020-09-17 02:24:22,129 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 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 [2020-09-17 02:24:22,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:22,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:22,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:22,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:22,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610071715] [2020-09-17 02:24:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:22,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:22,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:22,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:22,358 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-17 02:24:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:22,795 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-17 02:24:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:22,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:22,797 INFO L225 Difference]: With dead ends: 203 [2020-09-17 02:24:22,797 INFO L226 Difference]: Without dead ends: 201 [2020-09-17 02:24:22,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-17 02:24:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-17 02:24:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-17 02:24:22,801 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-17 02:24:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:22,801 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-17 02:24:22,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-17 02:24:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:22,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:22,802 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:23,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:23,009 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-17 02:24:23,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:23,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242538944] [2020-09-17 02:24:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:23,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242538944] [2020-09-17 02:24:23,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022703938] [2020-09-17 02:24:23,159 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 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 [2020-09-17 02:24:23,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:23,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:23,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:23,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:23,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011984388] [2020-09-17 02:24:23,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:23,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:23,374 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-17 02:24:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:23,850 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-17 02:24:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:23,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:23,852 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:24:23,852 INFO L226 Difference]: Without dead ends: 192 [2020-09-17 02:24:23,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:24:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-17 02:24:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-17 02:24:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-17 02:24:23,856 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-17 02:24:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:23,856 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-17 02:24:23,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-17 02:24:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:23,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:23,857 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:24,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:24,068 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-17 02:24:24,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:24,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656321406] [2020-09-17 02:24:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:24,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656321406] [2020-09-17 02:24:24,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008697601] [2020-09-17 02:24:24,170 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 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 [2020-09-17 02:24:24,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:24,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:24,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:24,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:24,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:24,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147443943] [2020-09-17 02:24:24,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:24,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:24,465 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-17 02:24:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:25,148 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-17 02:24:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:25,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:25,149 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:24:25,149 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:25,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:24:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-17 02:24:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:24:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-17 02:24:25,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-17 02:24:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:25,154 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-17 02:24:25,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-17 02:24:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:25,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:25,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:25,355 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-17 02:24:25,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:25,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147904707] [2020-09-17 02:24:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:25,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147904707] [2020-09-17 02:24:25,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95363143] [2020-09-17 02:24:25,478 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 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 [2020-09-17 02:24:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:25,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:25,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:25,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507787967] [2020-09-17 02:24:25,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:25,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:25,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:25,701 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-17 02:24:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:26,384 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-17 02:24:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:26,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:26,386 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:24:26,386 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:24:26,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:24:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-17 02:24:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:24:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-17 02:24:26,389 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-17 02:24:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:26,390 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-17 02:24:26,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-17 02:24:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:26,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:26,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:26,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:26,591 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-17 02:24:26,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:26,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494296873] [2020-09-17 02:24:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:26,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494296873] [2020-09-17 02:24:26,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905115039] [2020-09-17 02:24:26,706 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 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 [2020-09-17 02:24:26,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:26,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:26,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:26,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080262082] [2020-09-17 02:24:26,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:26,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:26,909 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-17 02:24:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:27,471 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-17 02:24:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:24:27,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:27,473 INFO L225 Difference]: With dead ends: 196 [2020-09-17 02:24:27,473 INFO L226 Difference]: Without dead ends: 194 [2020-09-17 02:24:27,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:24:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-17 02:24:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-17 02:24:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-17 02:24:27,477 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-17 02:24:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:27,477 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-17 02:24:27,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-17 02:24:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:27,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:27,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:27,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:24:27,679 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-17 02:24:27,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:27,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436458918] [2020-09-17 02:24:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:27,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436458918] [2020-09-17 02:24:27,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99580853] [2020-09-17 02:24:27,794 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 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 [2020-09-17 02:24:27,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:28,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:28,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:28,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205178714] [2020-09-17 02:24:28,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:28,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:28,013 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:28,788 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-17 02:24:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:28,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:28,790 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:24:28,790 INFO L226 Difference]: Without dead ends: 209 [2020-09-17 02:24:28,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-17 02:24:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-17 02:24:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:24:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-17 02:24:28,793 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-17 02:24:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:28,793 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-17 02:24:28,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-17 02:24:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:28,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:28,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:28,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:24:28,995 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-17 02:24:28,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:28,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824730449] [2020-09-17 02:24:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:29,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824730449] [2020-09-17 02:24:29,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130049381] [2020-09-17 02:24:29,113 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 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 [2020-09-17 02:24:29,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:29,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:29,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:29,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127289394] [2020-09-17 02:24:29,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:29,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:29,344 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-17 02:24:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:30,105 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-17 02:24:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:24:30,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:30,107 INFO L225 Difference]: With dead ends: 215 [2020-09-17 02:24:30,107 INFO L226 Difference]: Without dead ends: 213 [2020-09-17 02:24:30,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:24:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-17 02:24:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-17 02:24:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-17 02:24:30,111 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-17 02:24:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:30,111 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-17 02:24:30,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-17 02:24:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:30,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:30,112 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:30,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:24:30,313 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-17 02:24:30,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:30,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637541636] [2020-09-17 02:24:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:30,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637541636] [2020-09-17 02:24:30,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154457854] [2020-09-17 02:24:30,430 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 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 [2020-09-17 02:24:30,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:30,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:30,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:30,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:30,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839932452] [2020-09-17 02:24:30,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:30,659 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-17 02:24:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:31,447 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:24:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:31,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:31,449 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:24:31,449 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:24:31,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:24:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-17 02:24:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:31,453 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:31,453 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:31,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:31,454 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:31,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:31,660 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-17 02:24:31,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:31,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984812832] [2020-09-17 02:24:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:31,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984812832] [2020-09-17 02:24:31,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323957064] [2020-09-17 02:24:31,775 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 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 [2020-09-17 02:24:31,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:31,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:31,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:32,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:32,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:32,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379683422] [2020-09-17 02:24:32,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:32,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:32,014 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:32,721 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-17 02:24:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:32,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:32,724 INFO L225 Difference]: With dead ends: 196 [2020-09-17 02:24:32,724 INFO L226 Difference]: Without dead ends: 191 [2020-09-17 02:24:32,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:24:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-17 02:24:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-17 02:24:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:32,729 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:32,729 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:32,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:32,730 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:32,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:24:32,931 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-17 02:24:32,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:32,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073443908] [2020-09-17 02:24:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:33,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073443908] [2020-09-17 02:24:33,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912985484] [2020-09-17 02:24:33,057 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 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 [2020-09-17 02:24:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:33,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:33,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:33,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:33,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578738934] [2020-09-17 02:24:33,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:33,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:33,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:33,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:33,263 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:34,308 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-17 02:24:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:24:34,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:34,310 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:24:34,310 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:24:34,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:24:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-17 02:24:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-17 02:24:34,318 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-17 02:24:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:34,318 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-17 02:24:34,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-17 02:24:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:34,319 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:34,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:34,530 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-17 02:24:34,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:34,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133916853] [2020-09-17 02:24:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:34,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133916853] [2020-09-17 02:24:34,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685761771] [2020-09-17 02:24:34,629 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 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 [2020-09-17 02:24:34,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:34,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:34,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:34,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369135005] [2020-09-17 02:24:34,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:34,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:34,859 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-17 02:24:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:35,730 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-17 02:24:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:24:35,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:35,731 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:24:35,732 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:24:35,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:24:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:24:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-17 02:24:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:35,735 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:35,735 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:35,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:35,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:35,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:35,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:24:35,936 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-17 02:24:35,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:35,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294291459] [2020-09-17 02:24:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:36,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294291459] [2020-09-17 02:24:36,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836368410] [2020-09-17 02:24:36,069 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 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 [2020-09-17 02:24:36,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:36,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:36,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:36,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:36,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094316727] [2020-09-17 02:24:36,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:36,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:36,325 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:37,539 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-17 02:24:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:37,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:37,542 INFO L225 Difference]: With dead ends: 247 [2020-09-17 02:24:37,542 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:24:37,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:24:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:24:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-17 02:24:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:24:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-17 02:24:37,546 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-17 02:24:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:37,547 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-17 02:24:37,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-17 02:24:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:37,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:37,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:37,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:37,748 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-17 02:24:37,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:37,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032181978] [2020-09-17 02:24:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:37,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032181978] [2020-09-17 02:24:37,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850611370] [2020-09-17 02:24:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:24:37,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:37,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:37,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:38,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:38,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:38,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:38,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543932219] [2020-09-17 02:24:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:38,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:38,083 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-17 02:24:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:39,257 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-17 02:24:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:39,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:39,259 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:24:39,260 INFO L226 Difference]: Without dead ends: 238 [2020-09-17 02:24:39,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:24:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-17 02:24:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-17 02:24:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-17 02:24:39,264 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-17 02:24:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:39,264 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-17 02:24:39,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-17 02:24:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:39,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:39,265 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:39,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-17 02:24:39,467 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-17 02:24:39,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:39,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906548224] [2020-09-17 02:24:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:39,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906548224] [2020-09-17 02:24:39,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731865218] [2020-09-17 02:24:39,584 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 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 [2020-09-17 02:24:39,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:39,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:39,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:39,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:39,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345982573] [2020-09-17 02:24:39,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:39,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:39,789 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-17 02:24:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:40,468 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-17 02:24:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:40,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:40,470 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:24:40,471 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:24:40,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:24:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:24:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-17 02:24:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:24:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-17 02:24:40,474 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-17 02:24:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:40,474 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-17 02:24:40,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-17 02:24:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:40,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:40,474 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:40,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:40,675 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-17 02:24:40,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:40,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255935593] [2020-09-17 02:24:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:40,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255935593] [2020-09-17 02:24:40,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557185698] [2020-09-17 02:24:40,790 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 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 [2020-09-17 02:24:40,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:40,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:40,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:41,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:41,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:41,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176562051] [2020-09-17 02:24:41,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:41,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:41,030 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-17 02:24:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:41,966 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-17 02:24:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:41,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:41,968 INFO L225 Difference]: With dead ends: 205 [2020-09-17 02:24:41,969 INFO L226 Difference]: Without dead ends: 203 [2020-09-17 02:24:41,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-17 02:24:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-17 02:24:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-17 02:24:41,972 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-17 02:24:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:41,972 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-17 02:24:41,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-17 02:24:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:41,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:41,972 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:42,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:24:42,173 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-17 02:24:42,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:42,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531309263] [2020-09-17 02:24:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:42,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531309263] [2020-09-17 02:24:42,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976213298] [2020-09-17 02:24:42,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:24:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:42,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:42,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:42,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:42,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135320851] [2020-09-17 02:24:42,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:42,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:42,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:42,528 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:43,646 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-17 02:24:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:24:43,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:43,649 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:24:43,649 INFO L226 Difference]: Without dead ends: 220 [2020-09-17 02:24:43,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:24:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-17 02:24:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-17 02:24:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-17 02:24:43,652 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-17 02:24:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:43,653 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-17 02:24:43,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-17 02:24:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:43,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:43,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:43,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-17 02:24:43,854 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-17 02:24:43,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:43,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384730024] [2020-09-17 02:24:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:43,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384730024] [2020-09-17 02:24:43,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016504763] [2020-09-17 02:24:43,984 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 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 [2020-09-17 02:24:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:44,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:44,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:44,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:44,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:44,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842869474] [2020-09-17 02:24:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:44,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:44,178 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:45,206 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-17 02:24:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:45,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:45,208 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:24:45,208 INFO L226 Difference]: Without dead ends: 220 [2020-09-17 02:24:45,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-17 02:24:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-17 02:24:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-17 02:24:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-17 02:24:45,212 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-17 02:24:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:45,212 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-17 02:24:45,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-17 02:24:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:45,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:45,212 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:45,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:24:45,413 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-17 02:24:45,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:45,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346080638] [2020-09-17 02:24:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:45,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346080638] [2020-09-17 02:24:45,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386552438] [2020-09-17 02:24:45,544 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 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 [2020-09-17 02:24:45,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:24:45,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:45,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:45,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:45,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:45,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:45,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575585704] [2020-09-17 02:24:45,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:45,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:45,757 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-17 02:24:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:46,972 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-17 02:24:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:46,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:46,975 INFO L225 Difference]: With dead ends: 224 [2020-09-17 02:24:46,975 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:24:46,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:24:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-17 02:24:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 02:24:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-17 02:24:46,979 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-17 02:24:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:46,980 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-17 02:24:46,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-17 02:24:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:46,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:46,981 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:47,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:47,190 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-17 02:24:47,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:47,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890463959] [2020-09-17 02:24:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:47,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890463959] [2020-09-17 02:24:47,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297881090] [2020-09-17 02:24:47,347 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 [2020-09-17 02:24:47,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:24:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:47,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:47,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:47,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:47,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:24:47,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123161552] [2020-09-17 02:24:47,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:24:47,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:24:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:24:47,639 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-17 02:24:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:47,970 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-17 02:24:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:47,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-17 02:24:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:47,973 INFO L225 Difference]: With dead ends: 185 [2020-09-17 02:24:47,973 INFO L226 Difference]: Without dead ends: 180 [2020-09-17 02:24:47,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-17 02:24:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-17 02:24:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-17 02:24:47,978 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-17 02:24:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-17 02:24:47,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:24:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-17 02:24:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:47,980 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:48,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:48,181 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-17 02:24:48,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:48,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932733746] [2020-09-17 02:24:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:48,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932733746] [2020-09-17 02:24:48,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068850518] [2020-09-17 02:24:48,355 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 [2020-09-17 02:24:48,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:24:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:48,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:48,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:48,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864276865] [2020-09-17 02:24:48,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:48,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:48,634 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-17 02:24:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:48,957 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-17 02:24:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:24:48,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:48,959 INFO L225 Difference]: With dead ends: 186 [2020-09-17 02:24:48,959 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 02:24:48,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:24:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 02:24:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-17 02:24:48,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:24:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-17 02:24:48,962 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-17 02:24:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:48,962 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-17 02:24:48,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-17 02:24:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:48,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:48,963 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:49,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-17 02:24:49,164 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-17 02:24:49,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:49,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608936405] [2020-09-17 02:24:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:49,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608936405] [2020-09-17 02:24:49,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323085012] [2020-09-17 02:24:49,312 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 [2020-09-17 02:24:49,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:49,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:49,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:49,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:49,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:49,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783401715] [2020-09-17 02:24:49,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:49,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:49,612 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-17 02:24:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:50,042 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-17 02:24:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:50,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:50,044 INFO L225 Difference]: With dead ends: 203 [2020-09-17 02:24:50,044 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:24:50,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:24:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:24:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-17 02:24:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:24:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-17 02:24:50,047 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-17 02:24:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:50,048 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-17 02:24:50,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-17 02:24:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:50,048 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:50,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:24:50,249 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-17 02:24:50,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:50,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592726194] [2020-09-17 02:24:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:50,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592726194] [2020-09-17 02:24:50,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406922673] [2020-09-17 02:24:50,394 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 [2020-09-17 02:24:50,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:24:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:50,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:50,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:50,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050899435] [2020-09-17 02:24:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:50,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:50,685 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-17 02:24:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:51,243 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-17 02:24:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:24:51,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:51,245 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:24:51,245 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:51,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-17 02:24:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-17 02:24:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-17 02:24:51,249 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-17 02:24:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:51,249 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-17 02:24:51,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-17 02:24:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:51,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:51,250 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:51,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:51,450 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:51,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-17 02:24:51,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:51,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297835295] [2020-09-17 02:24:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:51,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297835295] [2020-09-17 02:24:51,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304817150] [2020-09-17 02:24:51,591 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 [2020-09-17 02:24:51,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:24:51,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:51,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:51,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:51,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803535305] [2020-09-17 02:24:51,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:51,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:51,857 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-17 02:24:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:52,473 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-17 02:24:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:24:52,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:52,475 INFO L225 Difference]: With dead ends: 213 [2020-09-17 02:24:52,476 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:24:52,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:24:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:24:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-17 02:24:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-17 02:24:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-17 02:24:52,479 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-17 02:24:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:52,480 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-17 02:24:52,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-17 02:24:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:52,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:52,480 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:52,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:52,681 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-17 02:24:52,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:52,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553073123] [2020-09-17 02:24:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:52,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553073123] [2020-09-17 02:24:52,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154755084] [2020-09-17 02:24:52,818 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 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 [2020-09-17 02:24:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:52,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:53,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:53,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:53,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095063545] [2020-09-17 02:24:53,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:53,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:53,102 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-17 02:24:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:53,691 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-17 02:24:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:24:53,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:53,693 INFO L225 Difference]: With dead ends: 207 [2020-09-17 02:24:53,693 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:24:53,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:24:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:24:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-17 02:24:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-17 02:24:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-17 02:24:53,696 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-17 02:24:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:53,696 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-17 02:24:53,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-17 02:24:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:53,697 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:53,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:53,898 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-17 02:24:53,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:53,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890970840] [2020-09-17 02:24:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:54,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890970840] [2020-09-17 02:24:54,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025112394] [2020-09-17 02:24:54,030 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 [2020-09-17 02:24:54,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:54,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:54,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:54,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62217713] [2020-09-17 02:24:54,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:54,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:54,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:54,275 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-17 02:24:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:54,745 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-17 02:24:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:24:54,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:54,750 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:24:54,750 INFO L226 Difference]: Without dead ends: 194 [2020-09-17 02:24:54,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:24:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-17 02:24:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-17 02:24:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-17 02:24:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-17 02:24:54,753 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-17 02:24:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:54,753 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-17 02:24:54,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-17 02:24:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:54,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:54,754 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:54,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-17 02:24:54,955 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-17 02:24:54,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:54,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004961034] [2020-09-17 02:24:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004961034] [2020-09-17 02:24:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955768192] [2020-09-17 02:24:55,105 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 [2020-09-17 02:24:55,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:24:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:55,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:55,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:55,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:55,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174125819] [2020-09-17 02:24:55,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:55,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:55,342 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-17 02:24:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:55,957 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:24:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:55,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:55,959 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:24:55,959 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 02:24:55,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 02:24:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-17 02:24:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-17 02:24:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-17 02:24:55,962 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-17 02:24:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:55,962 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-17 02:24:55,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-17 02:24:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:55,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:55,963 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:56,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-17 02:24:56,164 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:56,164 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-17 02:24:56,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:56,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370049053] [2020-09-17 02:24:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:56,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370049053] [2020-09-17 02:24:56,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744556863] [2020-09-17 02:24:56,324 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 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 [2020-09-17 02:24:56,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:56,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:56,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:56,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579519868] [2020-09-17 02:24:56,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:56,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:56,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:56,624 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-17 02:24:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:56,710 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-17 02:24:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:24:56,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:56,712 INFO L225 Difference]: With dead ends: 188 [2020-09-17 02:24:56,712 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 02:24:56,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 02:24:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-17 02:24:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:24:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-17 02:24:56,717 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-17 02:24:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:56,717 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-17 02:24:56,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-17 02:24:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:56,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:56,717 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:56,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:24:56,918 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-17 02:24:56,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:56,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20344241] [2020-09-17 02:24:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:57,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20344241] [2020-09-17 02:24:57,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329736545] [2020-09-17 02:24:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:24:57,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:57,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:57,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:57,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:57,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511295796] [2020-09-17 02:24:57,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:57,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:57,338 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-17 02:24:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:57,484 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-17 02:24:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:24:57,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:57,486 INFO L225 Difference]: With dead ends: 199 [2020-09-17 02:24:57,486 INFO L226 Difference]: Without dead ends: 197 [2020-09-17 02:24:57,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:24:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-17 02:24:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-17 02:24:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:24:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-17 02:24:57,490 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-17 02:24:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:57,490 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-17 02:24:57,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-17 02:24:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:57,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:57,490 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:57,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:24:57,691 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-17 02:24:57,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:57,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297749955] [2020-09-17 02:24:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:57,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297749955] [2020-09-17 02:24:57,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405652425] [2020-09-17 02:24:57,839 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 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 [2020-09-17 02:24:57,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:57,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:58,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:58,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:58,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812084593] [2020-09-17 02:24:58,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:58,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:58,154 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-17 02:24:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:58,426 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-17 02:24:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:24:58,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:58,428 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:24:58,428 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:58,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:24:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-17 02:24:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-17 02:24:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-17 02:24:58,431 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-17 02:24:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:58,431 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-17 02:24:58,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-17 02:24:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:58,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:58,432 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:58,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:24:58,633 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-17 02:24:58,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:58,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510534251] [2020-09-17 02:24:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510534251] [2020-09-17 02:24:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122372094] [2020-09-17 02:24:58,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:24:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:03,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:03,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:03,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724192437] [2020-09-17 02:25:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:03,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:03,018 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-17 02:25:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:03,386 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-17 02:25:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:03,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:03,388 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:25:03,388 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:25:03,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:25:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-17 02:25:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:25:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-17 02:25:03,392 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-17 02:25:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:03,393 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-17 02:25:03,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-17 02:25:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:03,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:03,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:03,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:25:03,603 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-17 02:25:03,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:03,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197427393] [2020-09-17 02:25:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:03,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197427393] [2020-09-17 02:25:03,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495227581] [2020-09-17 02:25:03,774 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 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 [2020-09-17 02:25:03,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:07,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:07,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:07,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358181969] [2020-09-17 02:25:07,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:07,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:25:07,109 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-17 02:25:11,325 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:25:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:11,594 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:25:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:11,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:11,596 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:11,596 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:11,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-17 02:25:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-17 02:25:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:25:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:25:11,601 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:25:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:11,601 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:25:11,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:25:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:11,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:11,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:11,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:11,809 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-17 02:25:11,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:11,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529361878] [2020-09-17 02:25:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:11,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529361878] [2020-09-17 02:25:11,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262591307] [2020-09-17 02:25:11,987 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 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 [2020-09-17 02:25:12,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:12,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:12,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:12,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:12,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:12,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856086334] [2020-09-17 02:25:12,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:12,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:12,387 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:12,827 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-17 02:25:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:12,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:12,829 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:25:12,829 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:25:12,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:25:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-17 02:25:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-17 02:25:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-17 02:25:12,832 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-17 02:25:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:12,832 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-17 02:25:12,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-17 02:25:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:12,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:12,833 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:13,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:25:13,033 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:13,034 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-17 02:25:13,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:13,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382606706] [2020-09-17 02:25:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:13,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382606706] [2020-09-17 02:25:13,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4843121] [2020-09-17 02:25:13,188 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 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 [2020-09-17 02:25:13,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:13,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:13,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:13,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:13,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779590401] [2020-09-17 02:25:13,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:13,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:13,494 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-17 02:25:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:13,900 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-17 02:25:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:13,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:13,902 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:25:13,902 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:25:13,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:25:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-17 02:25:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:25:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:25:13,905 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:25:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:13,905 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:25:13,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:25:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:13,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:14,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:14,107 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-17 02:25:14,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:14,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623365384] [2020-09-17 02:25:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:14,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623365384] [2020-09-17 02:25:14,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562173446] [2020-09-17 02:25:14,263 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 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 [2020-09-17 02:25:14,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:14,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:14,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:14,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785549463] [2020-09-17 02:25:14,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:14,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:14,551 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:14,996 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-17 02:25:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:14,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:14,998 INFO L225 Difference]: With dead ends: 224 [2020-09-17 02:25:14,998 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:25:14,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:25:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-17 02:25:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:25:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:25:15,001 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:25:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:15,001 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:25:15,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:25:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:15,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:15,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:15,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:15,203 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-17 02:25:15,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:15,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992514233] [2020-09-17 02:25:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:15,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992514233] [2020-09-17 02:25:15,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466975579] [2020-09-17 02:25:15,365 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 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 [2020-09-17 02:25:15,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:15,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:15,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:15,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958824127] [2020-09-17 02:25:15,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:15,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:15,649 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:16,052 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-17 02:25:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:16,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:16,054 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:16,054 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:16,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:25:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-17 02:25:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:25:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:25:16,058 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:25:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:16,058 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:25:16,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:25:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:16,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:16,059 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:16,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:16,262 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-17 02:25:16,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:16,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74743527] [2020-09-17 02:25:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:16,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74743527] [2020-09-17 02:25:16,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506511498] [2020-09-17 02:25:16,413 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 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 [2020-09-17 02:25:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:16,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:16,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:16,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20164727] [2020-09-17 02:25:16,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:16,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:16,671 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:16,934 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-17 02:25:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:16,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:16,936 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:25:16,936 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:25:16,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:25:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:25:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-17 02:25:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-17 02:25:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-17 02:25:16,940 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-17 02:25:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:16,940 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-17 02:25:16,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-17 02:25:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:16,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:16,941 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:17,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:17,152 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-17 02:25:17,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:17,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86512729] [2020-09-17 02:25:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:17,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86512729] [2020-09-17 02:25:17,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098005116] [2020-09-17 02:25:17,302 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 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 [2020-09-17 02:25:17,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:17,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:17,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:17,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:17,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651884587] [2020-09-17 02:25:17,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:17,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:17,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:17,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:17,633 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-17 02:25:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:18,134 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-17 02:25:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:18,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:18,136 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:25:18,136 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:25:18,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:25:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:25:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-17 02:25:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:25:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-17 02:25:18,140 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-17 02:25:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:18,140 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-17 02:25:18,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-17 02:25:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:18,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:18,141 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:18,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:25:18,341 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-17 02:25:18,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:18,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252022011] [2020-09-17 02:25:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252022011] [2020-09-17 02:25:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239314605] [2020-09-17 02:25:18,498 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 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 [2020-09-17 02:25:18,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:18,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:18,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:18,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952696659] [2020-09-17 02:25:18,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:18,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:18,853 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-17 02:25:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:19,454 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-17 02:25:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:19,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:19,456 INFO L225 Difference]: With dead ends: 216 [2020-09-17 02:25:19,456 INFO L226 Difference]: Without dead ends: 214 [2020-09-17 02:25:19,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:25:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-17 02:25:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-17 02:25:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:25:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-17 02:25:19,460 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-17 02:25:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:19,460 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-17 02:25:19,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-17 02:25:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:19,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:19,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:19,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:25:19,672 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-17 02:25:19,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:19,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810985909] [2020-09-17 02:25:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:19,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810985909] [2020-09-17 02:25:19,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370526768] [2020-09-17 02:25:19,811 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 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 [2020-09-17 02:25:19,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:21,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:21,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:21,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117407190] [2020-09-17 02:25:21,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:21,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:21,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:21,885 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-17 02:25:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:22,407 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-17 02:25:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:25:22,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:22,409 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:25:22,409 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:25:22,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:25:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:25:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-17 02:25:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-17 02:25:22,413 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-17 02:25:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:22,413 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-17 02:25:22,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-17 02:25:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:22,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:22,414 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:22,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:25:22,614 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-17 02:25:22,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:22,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900564067] [2020-09-17 02:25:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:22,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900564067] [2020-09-17 02:25:22,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737964786] [2020-09-17 02:25:22,770 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 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 [2020-09-17 02:25:22,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:23,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:23,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:23,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424238111] [2020-09-17 02:25:23,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:23,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:23,040 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:23,497 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-17 02:25:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:25:23,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:23,499 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:25:23,500 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:25:23,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:25:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-17 02:25:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:25:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-17 02:25:23,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-17 02:25:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:23,504 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-17 02:25:23,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-17 02:25:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:23,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:23,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:23,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:25:23,707 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-17 02:25:23,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:23,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899027482] [2020-09-17 02:25:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:23,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899027482] [2020-09-17 02:25:23,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810544466] [2020-09-17 02:25:23,861 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 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 [2020-09-17 02:25:23,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:24,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:24,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:24,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69443142] [2020-09-17 02:25:24,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:24,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:24,188 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-17 02:25:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:24,662 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:25:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:24,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:24,664 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:24,664 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:24,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-17 02:25:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:25:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-17 02:25:24,667 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-17 02:25:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:24,668 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-17 02:25:24,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-17 02:25:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:24,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:24,668 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:24,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:24,869 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-17 02:25:24,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:24,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912757329] [2020-09-17 02:25:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:25,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912757329] [2020-09-17 02:25:25,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377643797] [2020-09-17 02:25:25,034 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 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 [2020-09-17 02:25:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:25,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:25,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:25,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527096343] [2020-09-17 02:25:25,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:25,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:25,310 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-17 02:25:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:25,675 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-17 02:25:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:25,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:25,677 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:25:25,677 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:25:25,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:25:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-17 02:25:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:25:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-17 02:25:25,681 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-17 02:25:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:25,681 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-17 02:25:25,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-17 02:25:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:25,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:25,682 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:25,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-17 02:25:25,882 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-17 02:25:25,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:25,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065428407] [2020-09-17 02:25:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:26,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065428407] [2020-09-17 02:25:26,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792067478] [2020-09-17 02:25:26,136 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 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 [2020-09-17 02:25:26,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:26,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:26,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:26,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:26,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:26,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:26,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109450320] [2020-09-17 02:25:26,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:26,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:26,400 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:26,512 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-17 02:25:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:25:26,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:26,514 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:25:26,514 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:25:26,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:25:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:25:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-17 02:25:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-17 02:25:26,518 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-17 02:25:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:26,519 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-17 02:25:26,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-17 02:25:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:26,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:26,519 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:26,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:26,720 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-17 02:25:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:26,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513775111] [2020-09-17 02:25:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:26,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513775111] [2020-09-17 02:25:26,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577778192] [2020-09-17 02:25:26,960 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 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 [2020-09-17 02:25:27,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:27,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:27,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:27,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34077247] [2020-09-17 02:25:27,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:27,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:27,257 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-17 02:25:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:27,457 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-17 02:25:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:25:27,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:27,459 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:25:27,459 INFO L226 Difference]: Without dead ends: 215 [2020-09-17 02:25:27,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:25:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-17 02:25:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-17 02:25:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-17 02:25:27,463 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-17 02:25:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:27,463 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-17 02:25:27,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-17 02:25:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:27,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:27,464 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:27,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:27,665 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-17 02:25:27,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:27,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134306807] [2020-09-17 02:25:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:27,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134306807] [2020-09-17 02:25:27,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854062197] [2020-09-17 02:25:27,871 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 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 [2020-09-17 02:25:27,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:28,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:28,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:28,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889442577] [2020-09-17 02:25:28,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:28,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:28,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:28,201 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-17 02:25:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:28,498 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-17 02:25:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:28,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:28,500 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:25:28,500 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:25:28,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:25:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-17 02:25:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-17 02:25:28,504 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-17 02:25:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:28,504 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-17 02:25:28,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-17 02:25:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:28,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:28,504 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:28,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:28,705 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:28,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-17 02:25:28,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:28,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46885087] [2020-09-17 02:25:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:28,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46885087] [2020-09-17 02:25:28,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563272043] [2020-09-17 02:25:28,899 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 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 [2020-09-17 02:25:28,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:31,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:31,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:31,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951926612] [2020-09-17 02:25:31,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:31,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:31,608 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-17 02:25:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:32,018 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-17 02:25:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:32,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:32,020 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:32,020 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:32,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:25:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-17 02:25:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-17 02:25:32,023 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-17 02:25:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:32,023 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-17 02:25:32,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-17 02:25:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:32,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:32,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-17 02:25:32,225 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-17 02:25:32,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:32,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093141497] [2020-09-17 02:25:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:32,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093141497] [2020-09-17 02:25:32,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906485132] [2020-09-17 02:25:32,430 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 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 [2020-09-17 02:25:32,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:25:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:37,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:37,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:37,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716658297] [2020-09-17 02:25:37,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:37,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:25:37,202 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-17 02:25:41,447 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:25:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:41,703 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-17 02:25:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:41,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:41,705 INFO L225 Difference]: With dead ends: 233 [2020-09-17 02:25:41,705 INFO L226 Difference]: Without dead ends: 231 [2020-09-17 02:25:41,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-17 02:25:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-17 02:25:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-17 02:25:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:41,708 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:41,708 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:41,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:41,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:41,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:41,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:41,911 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-17 02:25:41,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:41,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396085047] [2020-09-17 02:25:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:42,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396085047] [2020-09-17 02:25:42,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620871321] [2020-09-17 02:25:42,101 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 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 [2020-09-17 02:25:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:42,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:42,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:42,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021525703] [2020-09-17 02:25:42,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:42,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:42,478 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:42,873 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-17 02:25:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:42,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:42,875 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:42,875 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:42,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:25:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-17 02:25:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:25:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-17 02:25:42,878 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-17 02:25:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:42,878 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-17 02:25:42,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-17 02:25:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:42,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:42,879 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:25:43,080 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-17 02:25:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762772035] [2020-09-17 02:25:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:43,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762772035] [2020-09-17 02:25:43,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906099177] [2020-09-17 02:25:43,248 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 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 [2020-09-17 02:25:43,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:43,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:43,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:43,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:43,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195285178] [2020-09-17 02:25:43,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:43,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:43,527 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-17 02:25:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:43,952 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-17 02:25:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:43,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:43,954 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:43,954 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:43,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-17 02:25:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:43,958 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:43,958 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:43,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:43,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:43,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:44,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:44,159 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-17 02:25:44,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:44,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703664537] [2020-09-17 02:25:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:44,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703664537] [2020-09-17 02:25:44,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780497384] [2020-09-17 02:25:44,336 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 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 [2020-09-17 02:25:44,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:25:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:44,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:44,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:44,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:44,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:44,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757382139] [2020-09-17 02:25:44,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:44,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:44,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:44,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:44,619 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:45,072 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-09-17 02:25:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:45,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:45,073 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:25:45,074 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:25:45,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:25:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-17 02:25:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:45,078 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:45,078 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:45,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:45,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:45,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:45,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:25:45,280 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-09-17 02:25:45,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:45,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082924915] [2020-09-17 02:25:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:45,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082924915] [2020-09-17 02:25:45,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061764873] [2020-09-17 02:25:45,437 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 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 [2020-09-17 02:25:45,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:45,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:45,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:45,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209922835] [2020-09-17 02:25:45,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:45,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:45,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:45,730 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:46,173 INFO L93 Difference]: Finished difference Result 230 states and 542 transitions. [2020-09-17 02:25:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:46,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:46,175 INFO L225 Difference]: With dead ends: 230 [2020-09-17 02:25:46,176 INFO L226 Difference]: Without dead ends: 228 [2020-09-17 02:25:46,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-17 02:25:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2020-09-17 02:25:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:46,180 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:46,180 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:46,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:46,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:46,181 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:46,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:25:46,389 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 137 times [2020-09-17 02:25:46,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:46,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772530400] [2020-09-17 02:25:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:46,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772530400] [2020-09-17 02:25:46,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690470311] [2020-09-17 02:25:46,556 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 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 [2020-09-17 02:25:46,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:46,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:46,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:46,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:46,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83054650] [2020-09-17 02:25:46,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:46,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:46,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:46,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:46,824 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:47,143 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-17 02:25:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:47,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:47,145 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:47,145 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:47,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-17 02:25:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:25:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-17 02:25:47,148 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-17 02:25:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:47,148 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-17 02:25:47,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-17 02:25:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:47,149 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:47,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:47,352 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 138 times [2020-09-17 02:25:47,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:47,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203226507] [2020-09-17 02:25:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:47,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203226507] [2020-09-17 02:25:47,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311307795] [2020-09-17 02:25:47,603 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 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 [2020-09-17 02:25:47,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:47,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:47,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:47,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544826276] [2020-09-17 02:25:47,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:47,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:47,858 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-17 02:25:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:48,020 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-17 02:25:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:25:48,022 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:48,022 INFO L225 Difference]: With dead ends: 208 [2020-09-17 02:25:48,022 INFO L226 Difference]: Without dead ends: 206 [2020-09-17 02:25:48,023 INFO L675 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 [2020-09-17 02:25:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-17 02:25:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-17 02:25:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:25:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-17 02:25:48,026 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-17 02:25:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:48,026 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-17 02:25:48,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-17 02:25:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:48,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:48,027 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:48,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:48,228 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 139 times [2020-09-17 02:25:48,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:48,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233302015] [2020-09-17 02:25:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:48,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233302015] [2020-09-17 02:25:48,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084412739] [2020-09-17 02:25:48,446 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 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 [2020-09-17 02:25:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:48,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:48,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:48,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121775167] [2020-09-17 02:25:48,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:48,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:48,724 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-17 02:25:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:48,945 INFO L93 Difference]: Finished difference Result 213 states and 504 transitions. [2020-09-17 02:25:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:48,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:48,948 INFO L225 Difference]: With dead ends: 213 [2020-09-17 02:25:48,948 INFO L226 Difference]: Without dead ends: 211 [2020-09-17 02:25:48,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:25:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-17 02:25:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-09-17 02:25:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-17 02:25:48,953 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-17 02:25:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:48,953 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-17 02:25:48,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-17 02:25:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:48,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:48,954 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:49,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:25:49,156 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 140 times [2020-09-17 02:25:49,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:49,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784475898] [2020-09-17 02:25:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784475898] [2020-09-17 02:25:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620959283] [2020-09-17 02:25:49,338 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 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 [2020-09-17 02:25:49,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:49,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:49,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:49,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:49,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439020853] [2020-09-17 02:25:49,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:49,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:49,647 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:50,014 INFO L93 Difference]: Finished difference Result 223 states and 524 transitions. [2020-09-17 02:25:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:50,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:50,022 INFO L225 Difference]: With dead ends: 223 [2020-09-17 02:25:50,022 INFO L226 Difference]: Without dead ends: 221 [2020-09-17 02:25:50,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-17 02:25:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2020-09-17 02:25:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:25:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-17 02:25:50,025 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-17 02:25:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:50,025 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-17 02:25:50,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-17 02:25:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:50,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:50,026 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:50,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:50,227 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 141 times [2020-09-17 02:25:50,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:50,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198404668] [2020-09-17 02:25:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:50,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198404668] [2020-09-17 02:25:50,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273980969] [2020-09-17 02:25:50,408 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 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 [2020-09-17 02:25:50,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:50,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:52,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:52,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:52,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6853079] [2020-09-17 02:25:52,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:52,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:52,660 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-17 02:25:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:53,125 INFO L93 Difference]: Finished difference Result 221 states and 520 transitions. [2020-09-17 02:25:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:53,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:53,127 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:25:53,127 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:25:53,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:25:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:25:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2020-09-17 02:25:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-17 02:25:53,131 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-17 02:25:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:53,132 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-17 02:25:53,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-17 02:25:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:53,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:53,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:53,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:53,343 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 142 times [2020-09-17 02:25:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:53,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843034859] [2020-09-17 02:25:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:53,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843034859] [2020-09-17 02:25:53,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675209432] [2020-09-17 02:25:53,511 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 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 [2020-09-17 02:25:53,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:53,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:58,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:58,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:58,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373362508] [2020-09-17 02:25:58,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:58,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:25:58,586 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-17 02:26:02,873 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:26:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:03,174 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-17 02:26:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:26:03,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:03,175 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:26:03,175 INFO L226 Difference]: Without dead ends: 227 [2020-09-17 02:26:03,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=149, Invalid=402, Unknown=1, NotChecked=0, Total=552 [2020-09-17 02:26:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-17 02:26:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-17 02:26:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-17 02:26:03,178 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-17 02:26:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:03,178 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-17 02:26:03,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-17 02:26:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:03,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:03,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:03,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:03,380 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 143 times [2020-09-17 02:26:03,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:03,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598570951] [2020-09-17 02:26:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:03,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598570951] [2020-09-17 02:26:03,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908541298] [2020-09-17 02:26:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:26:03,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:26:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:03,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:03,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:03,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444001597] [2020-09-17 02:26:03,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:03,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:03,962 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-17 02:26:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:04,496 INFO L93 Difference]: Finished difference Result 221 states and 524 transitions. [2020-09-17 02:26:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:26:04,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:04,498 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:26:04,499 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:26:04,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:26:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:26:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2020-09-17 02:26:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:26:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-17 02:26:04,502 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-17 02:26:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:04,502 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-17 02:26:04,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-17 02:26:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:04,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:04,503 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:04,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-09-17 02:26:04,704 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 144 times [2020-09-17 02:26:04,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:04,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495597345] [2020-09-17 02:26:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:04,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495597345] [2020-09-17 02:26:04,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907933891] [2020-09-17 02:26:04,940 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 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 [2020-09-17 02:26:04,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:26:04,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:04,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:05,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:05,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:05,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445063400] [2020-09-17 02:26:05,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:05,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:05,249 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-17 02:26:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:05,447 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-17 02:26:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:26:05,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:05,449 INFO L225 Difference]: With dead ends: 204 [2020-09-17 02:26:05,449 INFO L226 Difference]: Without dead ends: 202 [2020-09-17 02:26:05,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:26:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-17 02:26:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-17 02:26:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:26:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-17 02:26:05,452 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-17 02:26:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:05,453 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-17 02:26:05,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-17 02:26:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:05,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:05,453 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:05,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:05,654 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 145 times [2020-09-17 02:26:05,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:05,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789431310] [2020-09-17 02:26:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:05,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789431310] [2020-09-17 02:26:05,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034234146] [2020-09-17 02:26:05,843 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 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 [2020-09-17 02:26:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:06,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:06,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:06,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758333360] [2020-09-17 02:26:06,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:06,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:06,142 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-17 02:26:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:06,398 INFO L93 Difference]: Finished difference Result 209 states and 495 transitions. [2020-09-17 02:26:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:26:06,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:06,400 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:26:06,400 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:26:06,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:26:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:26:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2020-09-17 02:26:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-17 02:26:06,404 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-17 02:26:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:06,404 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-17 02:26:06,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-17 02:26:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:06,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:06,405 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:06,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:26:06,605 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 146 times [2020-09-17 02:26:06,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:06,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144120288] [2020-09-17 02:26:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:06,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144120288] [2020-09-17 02:26:06,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13203654] [2020-09-17 02:26:06,776 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 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 [2020-09-17 02:26:06,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:26:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:07,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:07,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:07,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072016346] [2020-09-17 02:26:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:07,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:07,127 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-17 02:26:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:07,562 INFO L93 Difference]: Finished difference Result 219 states and 515 transitions. [2020-09-17 02:26:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:26:07,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:07,563 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:26:07,563 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:26:07,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:26:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:26:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-17 02:26:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:26:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-17 02:26:07,566 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-17 02:26:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:07,567 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-17 02:26:07,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-17 02:26:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:07,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:07,567 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:07,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:26:07,768 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 147 times [2020-09-17 02:26:07,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:07,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035931779] [2020-09-17 02:26:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:07,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035931779] [2020-09-17 02:26:07,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752638842] [2020-09-17 02:26:07,966 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 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 [2020-09-17 02:26:08,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:26:08,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:08,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:08,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:08,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:08,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173541526] [2020-09-17 02:26:08,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:08,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:08,302 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-17 02:26:08,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:08,574 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-17 02:26:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:26:08,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:08,576 INFO L225 Difference]: With dead ends: 200 [2020-09-17 02:26:08,576 INFO L226 Difference]: Without dead ends: 198 [2020-09-17 02:26:08,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:26:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-17 02:26:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-17 02:26:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-17 02:26:08,580 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-17 02:26:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:08,580 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-17 02:26:08,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-17 02:26:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:08,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:08,585 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:08,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:08,793 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 148 times [2020-09-17 02:26:08,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:08,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306785733] [2020-09-17 02:26:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:08,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306785733] [2020-09-17 02:26:08,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200674074] [2020-09-17 02:26:08,967 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 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 [2020-09-17 02:26:09,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:26:09,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:09,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:09,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:09,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332207541] [2020-09-17 02:26:09,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:09,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:09,274 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-17 02:26:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:09,605 INFO L93 Difference]: Finished difference Result 205 states and 486 transitions. [2020-09-17 02:26:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:26:09,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:09,608 INFO L225 Difference]: With dead ends: 205 [2020-09-17 02:26:09,608 INFO L226 Difference]: Without dead ends: 203 [2020-09-17 02:26:09,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:26:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-17 02:26:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2020-09-17 02:26:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-17 02:26:09,612 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-17 02:26:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:09,612 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-17 02:26:09,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-17 02:26:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:09,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:09,613 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:09,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:26:09,824 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 149 times [2020-09-17 02:26:09,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:09,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796318139] [2020-09-17 02:26:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:09,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796318139] [2020-09-17 02:26:09,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304324360] [2020-09-17 02:26:09,993 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 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 [2020-09-17 02:26:10,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:26:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:10,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:10,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:10,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821519400] [2020-09-17 02:26:10,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:10,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:10,303 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-09-17 02:26:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:10,586 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-17 02:26:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:26:10,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:10,588 INFO L225 Difference]: With dead ends: 201 [2020-09-17 02:26:10,588 INFO L226 Difference]: Without dead ends: 199 [2020-09-17 02:26:10,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:26:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-17 02:26:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-17 02:26:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:26:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:26:10,592 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:26:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:26:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:26:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:10,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:10,593 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:10,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:10,802 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:10,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 150 times [2020-09-17 02:26:10,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:10,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990793793] [2020-09-17 02:26:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:10,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990793793] [2020-09-17 02:26:10,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137301932] [2020-09-17 02:26:10,962 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 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 [2020-09-17 02:26:11,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:26:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:11,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:26:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:11,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:11,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:11,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513889644] [2020-09-17 02:26:11,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:11,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:11,288 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-17 02:26:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:12,043 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-17 02:26:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:26:12,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:12,045 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:26:12,045 INFO L226 Difference]: Without dead ends: 221 [2020-09-17 02:26:12,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:26:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-17 02:26:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-17 02:26:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:26:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-17 02:26:12,049 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-17 02:26:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:12,049 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-17 02:26:12,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-17 02:26:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:12,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:12,049 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:12,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-09-17 02:26:12,251 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 151 times [2020-09-17 02:26:12,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:12,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142633189] [2020-09-17 02:26:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:12,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142633189] [2020-09-17 02:26:12,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941744441] [2020-09-17 02:26:12,411 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 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 [2020-09-17 02:26:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:12,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:12,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:12,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854381773] [2020-09-17 02:26:12,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:12,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:12,728 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-17 02:26:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:13,326 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:26:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:26:13,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:13,328 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:26:13,329 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:26:13,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:26:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-17 02:26:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:26:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:26:13,332 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:26:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:13,332 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:26:13,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:26:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:13,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:13,333 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:13,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:13,534 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 152 times [2020-09-17 02:26:13,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:13,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138299767] [2020-09-17 02:26:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:13,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138299767] [2020-09-17 02:26:13,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522322208] [2020-09-17 02:26:13,691 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 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 [2020-09-17 02:26:13,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:26:13,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:13,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:14,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:14,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:14,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145717642] [2020-09-17 02:26:14,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:14,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:14,053 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-17 02:26:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:15,007 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-17 02:26:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:26:15,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:15,009 INFO L225 Difference]: With dead ends: 248 [2020-09-17 02:26:15,010 INFO L226 Difference]: Without dead ends: 243 [2020-09-17 02:26:15,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:26:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-17 02:26:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-17 02:26:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:26:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:26:15,013 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:26:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:15,013 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:26:15,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:26:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:15,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:15,014 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:15,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:15,215 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 153 times [2020-09-17 02:26:15,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:15,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281407027] [2020-09-17 02:26:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:15,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281407027] [2020-09-17 02:26:15,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650955656] [2020-09-17 02:26:15,371 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 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 [2020-09-17 02:26:15,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:26:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:26:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:15,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:15,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-09-17 02:26:15,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859044323] [2020-09-17 02:26:15,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:26:15,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:26:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:26:15,542 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 13 states. [2020-09-17 02:26:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:15,969 INFO L93 Difference]: Finished difference Result 246 states and 583 transitions. [2020-09-17 02:26:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:15,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-09-17 02:26:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:15,971 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:26:15,971 INFO L226 Difference]: Without dead ends: 241 [2020-09-17 02:26:15,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:26:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-17 02:26:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2020-09-17 02:26:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-17 02:26:15,974 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-17 02:26:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:15,974 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-17 02:26:15,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:26:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-17 02:26:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:15,975 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:16,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:16,181 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 154 times [2020-09-17 02:26:16,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:16,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771803378] [2020-09-17 02:26:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:16,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771803378] [2020-09-17 02:26:16,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359174499] [2020-09-17 02:26:16,337 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 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 [2020-09-17 02:26:16,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:26:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:16,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:16,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:16,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295385747] [2020-09-17 02:26:16,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:16,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:16,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:16,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:16,715 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-17 02:26:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:17,500 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-17 02:26:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:26:17,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:17,502 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:26:17,502 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:26:17,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:26:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-17 02:26:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:26:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-17 02:26:17,505 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-17 02:26:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:17,506 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-17 02:26:17,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-17 02:26:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:17,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:17,507 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:17,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:17,716 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 155 times [2020-09-17 02:26:17,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:17,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074742103] [2020-09-17 02:26:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:17,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074742103] [2020-09-17 02:26:17,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430962326] [2020-09-17 02:26:17,874 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 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 [2020-09-17 02:26:17,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:26:17,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:18,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:18,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:18,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476064608] [2020-09-17 02:26:18,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:18,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:18,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:18,227 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-17 02:26:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:19,144 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-17 02:26:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:26:19,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:19,146 INFO L225 Difference]: With dead ends: 252 [2020-09-17 02:26:19,146 INFO L226 Difference]: Without dead ends: 250 [2020-09-17 02:26:19,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:26:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-17 02:26:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-17 02:26:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:26:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:26:19,150 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:26:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:19,150 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:26:19,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:26:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:19,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:19,150 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:19,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:26:19,351 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 156 times [2020-09-17 02:26:19,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:19,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278515880] [2020-09-17 02:26:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278515880] [2020-09-17 02:26:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949851715] [2020-09-17 02:26:19,512 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 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 [2020-09-17 02:26:19,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:26:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:19,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:19,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:19,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:19,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110777521] [2020-09-17 02:26:19,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:19,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:19,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:19,888 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-17 02:26:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:21,133 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-17 02:26:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:26:21,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:21,135 INFO L225 Difference]: With dead ends: 258 [2020-09-17 02:26:21,135 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:26:21,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:26:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:26:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-17 02:26:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:26:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:26:21,139 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:26:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:21,140 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:26:21,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:26:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:21,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:21,140 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:21,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:26:21,341 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 157 times [2020-09-17 02:26:21,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:21,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860572427] [2020-09-17 02:26:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:21,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860572427] [2020-09-17 02:26:21,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382248815] [2020-09-17 02:26:21,508 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 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 [2020-09-17 02:26:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:23,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:23,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:23,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:23,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184063124] [2020-09-17 02:26:23,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:23,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:26:23,895 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:26:28,332 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-17 02:26:32,655 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-09-17 02:26:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:33,457 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-17 02:26:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:26:33,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:33,459 INFO L225 Difference]: With dead ends: 287 [2020-09-17 02:26:33,459 INFO L226 Difference]: Without dead ends: 279 [2020-09-17 02:26:33,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=386, Invalid=873, Unknown=1, NotChecked=0, Total=1260 [2020-09-17 02:26:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-17 02:26:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-17 02:26:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-17 02:26:33,464 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-17 02:26:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:33,464 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-17 02:26:33,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-17 02:26:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:33,465 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:33,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-17 02:26:33,674 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 158 times [2020-09-17 02:26:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:33,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979351879] [2020-09-17 02:26:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:33,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979351879] [2020-09-17 02:26:33,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459375878] [2020-09-17 02:26:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:26:33,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:26:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:33,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:34,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:34,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:26:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:34,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:34,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:34,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038185767] [2020-09-17 02:26:34,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:34,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:34,394 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-17 02:26:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:35,582 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-17 02:26:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:26:35,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:35,584 INFO L225 Difference]: With dead ends: 260 [2020-09-17 02:26:35,584 INFO L226 Difference]: Without dead ends: 255 [2020-09-17 02:26:35,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:26:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-17 02:26:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-17 02:26:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:26:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-17 02:26:35,589 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-17 02:26:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:35,589 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-17 02:26:35,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-17 02:26:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:35,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:35,590 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:35,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:35,794 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 159 times [2020-09-17 02:26:35,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:35,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793685768] [2020-09-17 02:26:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793685768] [2020-09-17 02:26:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302649507] [2020-09-17 02:26:35,973 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 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 [2020-09-17 02:26:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:26:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:36,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:39,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:39,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:39,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820500978] [2020-09-17 02:26:39,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:39,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:39,815 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-17 02:26:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:40,480 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-17 02:26:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:40,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:40,483 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:26:40,483 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:26:40,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:26:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-17 02:26:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-17 02:26:40,486 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-17 02:26:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:40,487 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-17 02:26:40,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-17 02:26:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:40,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:40,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:40,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:40,688 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 160 times [2020-09-17 02:26:40,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:40,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673113956] [2020-09-17 02:26:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:40,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673113956] [2020-09-17 02:26:40,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185953594] [2020-09-17 02:26:40,852 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 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 [2020-09-17 02:26:40,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:26:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:46,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:46,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456423859] [2020-09-17 02:26:46,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:46,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:26:46,619 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-17 02:26:51,064 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:26:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:57,569 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-17 02:26:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:57,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:57,570 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:26:57,571 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:26:57,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2020-09-17 02:26:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:26:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-17 02:26:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-17 02:26:57,575 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-17 02:26:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:57,575 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-17 02:26:57,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-17 02:26:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:57,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:57,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:57,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:26:57,777 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 161 times [2020-09-17 02:26:57,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:57,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961686653] [2020-09-17 02:26:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:57,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961686653] [2020-09-17 02:26:57,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887641246] [2020-09-17 02:26:57,940 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 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 [2020-09-17 02:26:58,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:26:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:58,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:58,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:58,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864207438] [2020-09-17 02:26:58,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:58,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:58,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:58,375 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-17 02:26:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:59,125 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-17 02:26:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:59,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:59,127 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:26:59,127 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:26:59,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:26:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-17 02:26:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-17 02:26:59,131 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-17 02:26:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:59,131 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-17 02:26:59,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-17 02:26:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:59,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:59,131 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:59,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:59,332 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 162 times [2020-09-17 02:26:59,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:59,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646647781] [2020-09-17 02:26:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:59,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646647781] [2020-09-17 02:26:59,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016005057] [2020-09-17 02:26:59,509 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 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 [2020-09-17 02:26:59,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:26:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:01,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:01,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:01,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350456433] [2020-09-17 02:27:01,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:01,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:01,485 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-17 02:27:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:02,624 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-17 02:27:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:27:02,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:02,626 INFO L225 Difference]: With dead ends: 254 [2020-09-17 02:27:02,626 INFO L226 Difference]: Without dead ends: 252 [2020-09-17 02:27:02,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:27:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-17 02:27:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-17 02:27:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:27:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-17 02:27:02,630 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-17 02:27:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:02,630 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-17 02:27:02,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-17 02:27:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:02,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:02,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:02,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:02,832 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 163 times [2020-09-17 02:27:02,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:02,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143871487] [2020-09-17 02:27:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:03,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143871487] [2020-09-17 02:27:03,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952255812] [2020-09-17 02:27:03,001 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 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 [2020-09-17 02:27:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:03,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:03,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:03,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31843542] [2020-09-17 02:27:03,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:03,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:03,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:03,422 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-17 02:27:07,994 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:27:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:22,983 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-17 02:27:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:27:22,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:22,986 INFO L225 Difference]: With dead ends: 264 [2020-09-17 02:27:22,986 INFO L226 Difference]: Without dead ends: 262 [2020-09-17 02:27:22,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=302, Invalid=750, Unknown=4, NotChecked=0, Total=1056 [2020-09-17 02:27:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-17 02:27:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-17 02:27:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:27:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-17 02:27:22,990 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-17 02:27:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:22,990 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-17 02:27:22,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-17 02:27:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:22,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:22,991 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:23,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:23,192 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 164 times [2020-09-17 02:27:23,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:23,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131205294] [2020-09-17 02:27:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:23,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131205294] [2020-09-17 02:27:23,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547617932] [2020-09-17 02:27:23,347 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 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 [2020-09-17 02:27:23,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:27:23,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:23,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:23,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:23,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448102616] [2020-09-17 02:27:23,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:23,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:23,761 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-17 02:27:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:24,893 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-17 02:27:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:27:24,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:24,895 INFO L225 Difference]: With dead ends: 255 [2020-09-17 02:27:24,895 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:27:24,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:27:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:27:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-17 02:27:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:24,899 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:24,900 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:24,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:24,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:24,900 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:25,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:25,101 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 165 times [2020-09-17 02:27:25,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:25,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781426597] [2020-09-17 02:27:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:25,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781426597] [2020-09-17 02:27:25,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075239919] [2020-09-17 02:27:25,273 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 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 [2020-09-17 02:27:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:27:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:25,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:25,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:27:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:25,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:25,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:25,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943817890] [2020-09-17 02:27:25,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:25,662 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:27,143 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-17 02:27:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:27:27,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:27,145 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:27:27,146 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:27:27,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:27:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:27:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-17 02:27:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:27,149 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:27,149 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:27,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:27,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:27,150 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:27,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:27,350 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 166 times [2020-09-17 02:27:27,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:27,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257575598] [2020-09-17 02:27:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:27,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257575598] [2020-09-17 02:27:27,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562818161] [2020-09-17 02:27:27,529 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 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 [2020-09-17 02:27:27,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:27:27,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:27,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:27,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:27,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:27,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036030567] [2020-09-17 02:27:27,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:27,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:27,972 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:29,608 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-17 02:27:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:27:29,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:29,611 INFO L225 Difference]: With dead ends: 279 [2020-09-17 02:27:29,611 INFO L226 Difference]: Without dead ends: 274 [2020-09-17 02:27:29,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:27:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-17 02:27:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-17 02:27:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:27:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-17 02:27:29,616 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-17 02:27:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:29,617 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-17 02:27:29,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-17 02:27:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:29,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:29,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:29,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:27:29,828 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 167 times [2020-09-17 02:27:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:29,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767155051] [2020-09-17 02:27:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:30,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767155051] [2020-09-17 02:27:30,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512755214] [2020-09-17 02:27:30,012 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 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 [2020-09-17 02:27:30,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:27:30,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:32,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:32,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:32,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924667374] [2020-09-17 02:27:32,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:32,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:32,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=198, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:27:32,751 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-17 02:27:37,312 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:27:41,619 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:27:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:42,428 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-17 02:27:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:27:42,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:42,431 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:27:42,431 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:27:42,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=362, Invalid=897, Unknown=1, NotChecked=0, Total=1260 [2020-09-17 02:27:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:27:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-17 02:27:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:42,435 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:42,435 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:42,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:42,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:42,436 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:42,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:27:42,636 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 168 times [2020-09-17 02:27:42,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:42,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946764849] [2020-09-17 02:27:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:42,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946764849] [2020-09-17 02:27:42,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583551749] [2020-09-17 02:27:42,831 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 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 [2020-09-17 02:27:42,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:27:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:51,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:27:51,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:51,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:51,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:51,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847647841] [2020-09-17 02:27:51,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:51,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:51,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=183, Unknown=4, NotChecked=0, Total=272 [2020-09-17 02:27:51,652 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:56,157 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:28:00,589 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-17 02:28:18,124 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-09-17 02:28:25,241 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-09-17 02:28:31,801 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-09-17 02:28:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:32,160 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-09-17 02:28:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:32,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:32,163 INFO L225 Difference]: With dead ends: 299 [2020-09-17 02:28:32,163 INFO L226 Difference]: Without dead ends: 291 [2020-09-17 02:28:32,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=452, Invalid=1018, Unknown=12, NotChecked=0, Total=1482 [2020-09-17 02:28:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-17 02:28:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-09-17 02:28:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-17 02:28:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-17 02:28:32,167 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-17 02:28:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:32,167 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-17 02:28:32,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-17 02:28:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:32,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:32,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:32,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:28:32,378 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 169 times [2020-09-17 02:28:32,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:32,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208252072] [2020-09-17 02:28:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:32,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208252072] [2020-09-17 02:28:32,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698532908] [2020-09-17 02:28:32,595 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 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 [2020-09-17 02:28:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:32,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:35,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:35,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:35,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041692172] [2020-09-17 02:28:35,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:35,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=192, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:28:35,084 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-17 02:28:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:37,387 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-17 02:28:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:37,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:37,389 INFO L225 Difference]: With dead ends: 292 [2020-09-17 02:28:37,390 INFO L226 Difference]: Without dead ends: 284 [2020-09-17 02:28:37,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=441, Invalid=1040, Unknown=1, NotChecked=0, Total=1482 [2020-09-17 02:28:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-17 02:28:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-17 02:28:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:28:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-17 02:28:37,394 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-17 02:28:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:37,394 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-17 02:28:37,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-17 02:28:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:37,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:37,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:37,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-17 02:28:37,595 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 170 times [2020-09-17 02:28:37,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:37,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841277709] [2020-09-17 02:28:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:37,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841277709] [2020-09-17 02:28:37,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387623154] [2020-09-17 02:28:37,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:28:37,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:38,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:38,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:38,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465266847] [2020-09-17 02:28:38,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:38,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:38,238 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-17 02:28:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:39,078 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-17 02:28:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:28:39,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:39,080 INFO L225 Difference]: With dead ends: 231 [2020-09-17 02:28:39,080 INFO L226 Difference]: Without dead ends: 229 [2020-09-17 02:28:39,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:28:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-17 02:28:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-17 02:28:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:28:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-17 02:28:39,084 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-17 02:28:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:39,084 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-17 02:28:39,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-17 02:28:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:39,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:39,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:39,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:28:39,286 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 171 times [2020-09-17 02:28:39,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:39,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195301690] [2020-09-17 02:28:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:39,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195301690] [2020-09-17 02:28:39,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546469819] [2020-09-17 02:28:39,485 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 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 [2020-09-17 02:28:39,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:39,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:39,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:39,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:39,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546962950] [2020-09-17 02:28:39,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:39,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:39,947 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-17 02:28:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:41,309 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-17 02:28:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:28:41,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:41,312 INFO L225 Difference]: With dead ends: 250 [2020-09-17 02:28:41,312 INFO L226 Difference]: Without dead ends: 248 [2020-09-17 02:28:41,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:28:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-17 02:28:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-17 02:28:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-17 02:28:41,316 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-17 02:28:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:41,316 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-17 02:28:41,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-17 02:28:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:41,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:41,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:41,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:41,518 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 172 times [2020-09-17 02:28:41,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:41,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698637477] [2020-09-17 02:28:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:41,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698637477] [2020-09-17 02:28:41,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350440851] [2020-09-17 02:28:41,741 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 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 [2020-09-17 02:28:41,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:41,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:42,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:42,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:42,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:42,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115639445] [2020-09-17 02:28:42,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:42,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:42,208 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-17 02:28:43,672 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-09-17 02:28:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:44,394 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-17 02:28:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:44,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:44,396 INFO L225 Difference]: With dead ends: 288 [2020-09-17 02:28:44,396 INFO L226 Difference]: Without dead ends: 283 [2020-09-17 02:28:44,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:28:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-17 02:28:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-17 02:28:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:28:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-17 02:28:44,399 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-17 02:28:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:44,400 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-17 02:28:44,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-17 02:28:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:44,400 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:44,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:28:44,601 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 173 times [2020-09-17 02:28:44,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:44,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587578771] [2020-09-17 02:28:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:44,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587578771] [2020-09-17 02:28:44,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489905474] [2020-09-17 02:28:44,800 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 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 [2020-09-17 02:28:44,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:28:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:45,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:45,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:45,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507783625] [2020-09-17 02:28:45,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:45,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:45,187 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-17 02:28:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:46,013 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-17 02:28:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:28:46,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:46,017 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:28:46,017 INFO L226 Difference]: Without dead ends: 234 [2020-09-17 02:28:46,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:28:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-17 02:28:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-17 02:28:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:46,020 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:46,021 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:46,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:46,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:46,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-17 02:28:46,224 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 174 times [2020-09-17 02:28:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:46,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570405766] [2020-09-17 02:28:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:46,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570405766] [2020-09-17 02:28:46,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9971101] [2020-09-17 02:28:46,421 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 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 [2020-09-17 02:28:46,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:28:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:46,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:46,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957162284] [2020-09-17 02:28:46,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:46,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:46,832 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:47,710 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-17 02:28:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:28:47,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:47,713 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:28:47,713 INFO L226 Difference]: Without dead ends: 244 [2020-09-17 02:28:47,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:28:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-17 02:28:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-17 02:28:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:47,716 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:47,716 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:47,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:47,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:47,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:47,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:47,918 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 175 times [2020-09-17 02:28:47,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:47,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508118831] [2020-09-17 02:28:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:48,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508118831] [2020-09-17 02:28:48,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678841008] [2020-09-17 02:28:48,126 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 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 [2020-09-17 02:28:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:48,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:48,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:48,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016648906] [2020-09-17 02:28:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:48,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:48,502 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:49,234 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-17 02:28:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:28:49,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:49,237 INFO L225 Difference]: With dead ends: 239 [2020-09-17 02:28:49,237 INFO L226 Difference]: Without dead ends: 237 [2020-09-17 02:28:49,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:28:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-17 02:28:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-17 02:28:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:49,241 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:49,241 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:49,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:49,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:49,242 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:49,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:49,442 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 176 times [2020-09-17 02:28:49,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:49,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130939858] [2020-09-17 02:28:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:49,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130939858] [2020-09-17 02:28:49,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757243723] [2020-09-17 02:28:49,628 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 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 [2020-09-17 02:28:49,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:49,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:50,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:50,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:50,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818579782] [2020-09-17 02:28:50,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:50,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:50,055 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:50,753 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-17 02:28:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:28:50,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:50,756 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:28:50,756 INFO L226 Difference]: Without dead ends: 227 [2020-09-17 02:28:50,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:28:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-17 02:28:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-17 02:28:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:28:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-17 02:28:50,760 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-17 02:28:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:50,760 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-17 02:28:50,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-17 02:28:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:50,760 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:50,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:50,961 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 177 times [2020-09-17 02:28:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:50,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098551955] [2020-09-17 02:28:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:51,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098551955] [2020-09-17 02:28:51,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324197365] [2020-09-17 02:28:51,165 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 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 [2020-09-17 02:28:51,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:51,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:51,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:51,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092903980] [2020-09-17 02:28:51,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:51,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:51,554 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-17 02:28:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:52,853 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-17 02:28:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:52,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:52,855 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:28:52,855 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:28:52,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=968, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:28:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:28:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-17 02:28:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:28:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-17 02:28:52,859 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-17 02:28:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:52,860 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-17 02:28:52,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-17 02:28:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:52,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:52,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:53,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:53,061 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 178 times [2020-09-17 02:28:53,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:53,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465678214] [2020-09-17 02:28:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465678214] [2020-09-17 02:28:53,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317145645] [2020-09-17 02:28:53,257 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 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 [2020-09-17 02:28:53,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:53,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:53,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:53,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:53,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061693259] [2020-09-17 02:28:53,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:53,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:53,650 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-17 02:28:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:54,926 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-17 02:28:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:28:54,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:54,929 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:28:54,929 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:28:54,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:28:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:28:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-17 02:28:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:28:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-17 02:28:54,933 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-17 02:28:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:54,933 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-17 02:28:54,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-17 02:28:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:54,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:54,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:55,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:28:55,134 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 179 times [2020-09-17 02:28:55,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:55,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530581908] [2020-09-17 02:28:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530581908] [2020-09-17 02:28:55,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775840910] [2020-09-17 02:28:55,330 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 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 [2020-09-17 02:28:55,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:28:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:55,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:55,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281948651] [2020-09-17 02:28:55,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:55,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:55,683 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-17 02:28:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:56,748 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-17 02:28:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:28:56,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:56,750 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:28:56,750 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:28:56,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:28:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:28:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-17 02:28:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:28:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-17 02:28:56,754 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-17 02:28:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:56,754 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-17 02:28:56,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-17 02:28:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:56,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:56,755 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:56,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:28:56,964 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 180 times [2020-09-17 02:28:56,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:56,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357032246] [2020-09-17 02:28:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:57,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357032246] [2020-09-17 02:28:57,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996261002] [2020-09-17 02:28:57,199 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 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 [2020-09-17 02:28:57,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:28:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:57,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:57,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991734998] [2020-09-17 02:28:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:57,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:57,592 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-17 02:28:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:58,974 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-17 02:28:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:58,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:58,977 INFO L225 Difference]: With dead ends: 268 [2020-09-17 02:28:58,978 INFO L226 Difference]: Without dead ends: 266 [2020-09-17 02:28:58,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=996, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:28:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-17 02:28:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-17 02:28:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:28:58,981 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:28:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:58,981 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:28:58,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:28:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:58,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:58,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:59,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:28:59,182 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 181 times [2020-09-17 02:28:59,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:59,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386631212] [2020-09-17 02:28:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:59,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386631212] [2020-09-17 02:28:59,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373057059] [2020-09-17 02:28:59,402 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 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 [2020-09-17 02:28:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:59,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:59,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:59,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713592360] [2020-09-17 02:28:59,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:59,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:59,802 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:29:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:01,236 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-17 02:29:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:29:01,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:01,239 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:29:01,240 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:29:01,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:29:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:29:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-17 02:29:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:29:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-17 02:29:01,243 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-17 02:29:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:01,243 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-17 02:29:01,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-17 02:29:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:01,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:01,244 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:01,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-09-17 02:29:01,445 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 182 times [2020-09-17 02:29:01,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:01,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577177913] [2020-09-17 02:29:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:01,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577177913] [2020-09-17 02:29:01,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316611301] [2020-09-17 02:29:01,665 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 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 [2020-09-17 02:29:01,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:02,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:02,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805725514] [2020-09-17 02:29:02,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:02,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:02,059 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-17 02:29:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:03,462 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-17 02:29:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:29:03,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:03,464 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:29:03,464 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:29:03,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:29:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:29:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-17 02:29:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:29:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:29:03,467 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:29:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:03,467 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:29:03,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:29:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:03,468 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:03,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:29:03,669 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 183 times [2020-09-17 02:29:03,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:03,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876659801] [2020-09-17 02:29:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:03,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876659801] [2020-09-17 02:29:03,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377501622] [2020-09-17 02:29:03,876 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 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 [2020-09-17 02:29:03,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:29:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:04,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:04,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:04,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:04,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996095113] [2020-09-17 02:29:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:04,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:04,219 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:29:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:05,537 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-17 02:29:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:29:05,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:05,539 INFO L225 Difference]: With dead ends: 248 [2020-09-17 02:29:05,539 INFO L226 Difference]: Without dead ends: 243 [2020-09-17 02:29:05,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:29:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-17 02:29:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-17 02:29:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:29:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:29:05,543 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:29:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:05,543 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:29:05,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:29:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:05,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:05,544 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:05,745 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 184 times [2020-09-17 02:29:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:05,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779265325] [2020-09-17 02:29:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:05,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779265325] [2020-09-17 02:29:05,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671834864] [2020-09-17 02:29:05,998 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 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 [2020-09-17 02:29:06,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:06,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:06,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:06,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:06,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:06,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508835987] [2020-09-17 02:29:06,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:06,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:06,561 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:29:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:08,438 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-17 02:29:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:29:08,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:08,440 INFO L225 Difference]: With dead ends: 287 [2020-09-17 02:29:08,440 INFO L226 Difference]: Without dead ends: 282 [2020-09-17 02:29:08,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:29:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-17 02:29:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-17 02:29:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:29:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-17 02:29:08,448 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-17 02:29:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:08,448 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-17 02:29:08,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-17 02:29:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:08,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:08,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:29:08,649 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 185 times [2020-09-17 02:29:08,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:08,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526421497] [2020-09-17 02:29:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:08,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526421497] [2020-09-17 02:29:08,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121620654] [2020-09-17 02:29:08,849 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 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 [2020-09-17 02:29:08,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:09,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:09,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:09,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409370553] [2020-09-17 02:29:09,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:09,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:09,221 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-17 02:29:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:10,903 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-17 02:29:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:29:10,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:10,906 INFO L225 Difference]: With dead ends: 284 [2020-09-17 02:29:10,906 INFO L226 Difference]: Without dead ends: 282 [2020-09-17 02:29:10,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:29:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-17 02:29:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-17 02:29:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:29:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:29:10,910 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:29:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:10,910 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:29:10,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:29:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:10,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:10,910 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:11,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:11,111 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 186 times [2020-09-17 02:29:11,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:11,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978143089] [2020-09-17 02:29:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:11,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978143089] [2020-09-17 02:29:11,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405756937] [2020-09-17 02:29:11,317 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 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 [2020-09-17 02:29:11,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:29:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:11,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:11,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:11,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:11,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398315845] [2020-09-17 02:29:11,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:11,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:11,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:11,745 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:29:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:13,727 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-17 02:29:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:29:13,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:13,731 INFO L225 Difference]: With dead ends: 289 [2020-09-17 02:29:13,731 INFO L226 Difference]: Without dead ends: 284 [2020-09-17 02:29:13,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:29:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-17 02:29:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-17 02:29:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-17 02:29:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-17 02:29:13,734 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-17 02:29:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:13,734 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-17 02:29:13,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-17 02:29:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:13,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:13,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:13,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:13,936 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 187 times [2020-09-17 02:29:13,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:13,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369873557] [2020-09-17 02:29:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:14,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369873557] [2020-09-17 02:29:14,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151623399] [2020-09-17 02:29:14,169 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 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 [2020-09-17 02:29:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:14,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:14,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:14,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:14,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:14,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:14,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808321801] [2020-09-17 02:29:14,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:14,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:14,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:14,557 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-17 02:29:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:16,937 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-17 02:29:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:29:16,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:16,940 INFO L225 Difference]: With dead ends: 312 [2020-09-17 02:29:16,940 INFO L226 Difference]: Without dead ends: 304 [2020-09-17 02:29:16,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=559, Invalid=1421, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:29:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-17 02:29:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-17 02:29:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:29:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-17 02:29:16,944 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-17 02:29:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:16,944 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-17 02:29:16,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-17 02:29:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:16,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:16,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:17,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:17,146 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:17,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 188 times [2020-09-17 02:29:17,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:17,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993621435] [2020-09-17 02:29:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993621435] [2020-09-17 02:29:17,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153872937] [2020-09-17 02:29:17,369 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 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 [2020-09-17 02:29:17,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:17,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:17,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:17,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930665952] [2020-09-17 02:29:17,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:17,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:17,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:17,768 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-17 02:29:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:19,115 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-17 02:29:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:29:19,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:19,118 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:29:19,118 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:29:19,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:29:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:29:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-17 02:29:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:29:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:29:19,122 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:29:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:19,122 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:29:19,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:29:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:19,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:19,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:19,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 02:29:19,324 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 189 times [2020-09-17 02:29:19,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:19,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569338556] [2020-09-17 02:29:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:19,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569338556] [2020-09-17 02:29:19,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973806664] [2020-09-17 02:29:19,552 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 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 [2020-09-17 02:29:19,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:29:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:19,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:19,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:19,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395950453] [2020-09-17 02:29:19,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:19,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:19,948 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:29:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:21,494 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-17 02:29:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:29:21,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:21,498 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:29:21,498 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:29:21,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:29:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:29:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-17 02:29:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:29:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:29:21,501 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:29:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:21,501 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:29:21,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:29:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:21,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:21,502 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:21,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-17 02:29:21,710 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 190 times [2020-09-17 02:29:21,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:21,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743226388] [2020-09-17 02:29:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:21,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743226388] [2020-09-17 02:29:21,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682372196] [2020-09-17 02:29:21,910 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 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 [2020-09-17 02:29:21,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:21,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:21,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:22,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:22,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:22,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:22,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924263222] [2020-09-17 02:29:22,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:22,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:22,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:22,277 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:29:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:24,085 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-17 02:29:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:29:24,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:24,089 INFO L225 Difference]: With dead ends: 296 [2020-09-17 02:29:24,089 INFO L226 Difference]: Without dead ends: 288 [2020-09-17 02:29:24,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:29:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-17 02:29:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-17 02:29:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:29:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-17 02:29:24,098 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-17 02:29:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:24,098 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-17 02:29:24,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-17 02:29:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:24,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:24,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:24,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 02:29:24,299 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 191 times [2020-09-17 02:29:24,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:24,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684817412] [2020-09-17 02:29:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:24,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684817412] [2020-09-17 02:29:24,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322822491] [2020-09-17 02:29:24,523 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 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 [2020-09-17 02:29:24,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:29:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:24,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:24,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:24,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:24,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013908798] [2020-09-17 02:29:24,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:24,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:24,862 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-17 02:29:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:26,675 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-17 02:29:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:29:26,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:26,678 INFO L225 Difference]: With dead ends: 298 [2020-09-17 02:29:26,678 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 02:29:26,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:29:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 02:29:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-17 02:29:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:29:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-17 02:29:26,683 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-17 02:29:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:26,683 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-17 02:29:26,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-17 02:29:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:26,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:26,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-17 02:29:26,884 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 192 times [2020-09-17 02:29:26,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:26,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203853463] [2020-09-17 02:29:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:27,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203853463] [2020-09-17 02:29:27,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958124895] [2020-09-17 02:29:27,105 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 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 [2020-09-17 02:29:27,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:29:27,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:27,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:27,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:27,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:27,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106342523] [2020-09-17 02:29:27,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:27,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:27,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:27,449 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-17 02:29:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:29,430 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-17 02:29:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:29:29,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:29,433 INFO L225 Difference]: With dead ends: 291 [2020-09-17 02:29:29,434 INFO L226 Difference]: Without dead ends: 283 [2020-09-17 02:29:29,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:29:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-17 02:29:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-17 02:29:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:29:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:29:29,438 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:29:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:29,438 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:29:29,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:29:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:29,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:29,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:29,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 02:29:29,640 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 193 times [2020-09-17 02:29:29,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:29,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633179387] [2020-09-17 02:29:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:29,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633179387] [2020-09-17 02:29:29,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236421824] [2020-09-17 02:29:29,863 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 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 [2020-09-17 02:29:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110391278] [2020-09-17 02:29:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:30,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:30,315 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:29:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:31,970 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-17 02:29:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:29:31,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:31,973 INFO L225 Difference]: With dead ends: 265 [2020-09-17 02:29:31,973 INFO L226 Difference]: Without dead ends: 263 [2020-09-17 02:29:31,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:29:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-17 02:29:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-17 02:29:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:29:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:29:31,977 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:29:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:31,977 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:29:31,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:29:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:31,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:31,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:32,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:32,179 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 194 times [2020-09-17 02:29:32,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:32,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533494601] [2020-09-17 02:29:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:32,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533494601] [2020-09-17 02:29:32,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905367162] [2020-09-17 02:29:32,387 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 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 [2020-09-17 02:29:32,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:32,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:32,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:32,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098852028] [2020-09-17 02:29:32,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:32,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:32,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:32,837 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:29:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:34,905 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-17 02:29:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:29:34,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:34,907 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:29:34,907 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:29:34,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:29:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:29:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-17 02:29:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:29:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:29:34,910 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:29:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:34,911 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:29:34,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:29:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:34,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:34,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:35,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 02:29:35,112 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 195 times [2020-09-17 02:29:35,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:35,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054843835] [2020-09-17 02:29:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:35,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054843835] [2020-09-17 02:29:35,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131525590] [2020-09-17 02:29:35,335 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 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 [2020-09-17 02:29:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:29:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:35,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:35,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:35,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:35,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645999591] [2020-09-17 02:29:35,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:35,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:35,739 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:29:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:38,467 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-17 02:29:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:29:38,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:38,471 INFO L225 Difference]: With dead ends: 285 [2020-09-17 02:29:38,471 INFO L226 Difference]: Without dead ends: 280 [2020-09-17 02:29:38,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=604, Invalid=1466, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:29:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-17 02:29:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-17 02:29:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:29:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:29:38,475 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:29:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:38,475 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:29:38,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:29:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:38,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:38,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:38,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:38,676 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 196 times [2020-09-17 02:29:38,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:38,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572542230] [2020-09-17 02:29:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:38,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572542230] [2020-09-17 02:29:38,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588333470] [2020-09-17 02:29:38,911 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 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 [2020-09-17 02:29:38,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:38,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:43,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:47,474 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-17 02:29:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:47,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:47,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:29:47,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448928794] [2020-09-17 02:29:47,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:29:47,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:29:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=223, Unknown=3, NotChecked=0, Total=306 [2020-09-17 02:29:47,479 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-17 02:29:51,770 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-17 02:29:56,542 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-17 02:29:56,833 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-09-17 02:29:59,830 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-09-17 02:30:02,252 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-17 02:30:29,625 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-17 02:30:36,250 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-17 02:31:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:25,364 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-17 02:31:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:31:25,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-17 02:31:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:25,368 INFO L225 Difference]: With dead ends: 302 [2020-09-17 02:31:25,369 INFO L226 Difference]: Without dead ends: 297 [2020-09-17 02:31:25,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=573, Invalid=1480, Unknown=17, NotChecked=0, Total=2070 [2020-09-17 02:31:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-17 02:31:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-17 02:31:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:31:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-17 02:31:25,373 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-17 02:31:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:25,373 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-17 02:31:25,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:31:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-17 02:31:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:25,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:25,373 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:25,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-17 02:31:25,574 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 197 times [2020-09-17 02:31:25,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:25,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887077064] [2020-09-17 02:31:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:25,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887077064] [2020-09-17 02:31:25,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853639356] [2020-09-17 02:31:25,831 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 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 [2020-09-17 02:31:25,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:31:25,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:26,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:26,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:26,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311126361] [2020-09-17 02:31:26,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:26,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:26,288 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-17 02:31:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:27,206 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-17 02:31:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:31:27,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:27,210 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:31:27,210 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:31:27,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:31:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:31:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-17 02:31:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:31:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:31:27,214 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:31:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:27,215 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:31:27,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:31:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:27,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:27,215 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:27,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:27,416 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 198 times [2020-09-17 02:31:27,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:27,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396970219] [2020-09-17 02:31:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:27,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396970219] [2020-09-17 02:31:27,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290289981] [2020-09-17 02:31:27,638 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 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 [2020-09-17 02:31:27,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:31:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:28,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:28,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:28,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:28,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784250513] [2020-09-17 02:31:28,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:28,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:28,048 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:31:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:29,169 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-17 02:31:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:31:29,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:29,173 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:31:29,173 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:31:29,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:31:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:31:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-17 02:31:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:31:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-17 02:31:29,176 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-17 02:31:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:29,176 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-17 02:31:29,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-17 02:31:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:29,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:29,177 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:29,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:29,378 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 199 times [2020-09-17 02:31:29,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:29,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606152370] [2020-09-17 02:31:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:29,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606152370] [2020-09-17 02:31:29,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107796471] [2020-09-17 02:31:29,645 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 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 [2020-09-17 02:31:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:30,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:30,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:30,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759820155] [2020-09-17 02:31:30,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:30,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:30,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:30,138 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-17 02:31:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:31,225 INFO L93 Difference]: Finished difference Result 227 states and 524 transitions. [2020-09-17 02:31:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:31:31,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:31,228 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:31:31,228 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:31:31,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:31:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:31:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-09-17 02:31:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:31:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-17 02:31:31,233 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-17 02:31:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:31,233 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-17 02:31:31,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-17 02:31:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:31,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:31,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:31,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 02:31:31,441 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 200 times [2020-09-17 02:31:31,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:31,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749427375] [2020-09-17 02:31:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:31,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749427375] [2020-09-17 02:31:31,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274986186] [2020-09-17 02:31:31,698 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 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 [2020-09-17 02:31:31,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:32,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:32,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:32,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93229323] [2020-09-17 02:31:32,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:32,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:32,267 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-17 02:31:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:33,440 INFO L93 Difference]: Finished difference Result 231 states and 533 transitions. [2020-09-17 02:31:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:31:33,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:33,442 INFO L225 Difference]: With dead ends: 231 [2020-09-17 02:31:33,442 INFO L226 Difference]: Without dead ends: 229 [2020-09-17 02:31:33,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:31:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-17 02:31:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2020-09-17 02:31:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:31:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-17 02:31:33,445 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-17 02:31:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:33,445 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-17 02:31:33,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-17 02:31:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:33,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:33,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:33,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:33,647 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 201 times [2020-09-17 02:31:33,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:33,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535003427] [2020-09-17 02:31:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:33,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535003427] [2020-09-17 02:31:33,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142884512] [2020-09-17 02:31:33,903 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 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 [2020-09-17 02:31:33,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:31:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:36,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:36,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:36,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557222112] [2020-09-17 02:31:36,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:36,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:36,722 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-17 02:31:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:38,198 INFO L93 Difference]: Finished difference Result 244 states and 558 transitions. [2020-09-17 02:31:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:31:38,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:38,200 INFO L225 Difference]: With dead ends: 244 [2020-09-17 02:31:38,200 INFO L226 Difference]: Without dead ends: 242 [2020-09-17 02:31:38,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:31:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-17 02:31:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2020-09-17 02:31:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:31:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-17 02:31:38,204 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-17 02:31:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:38,204 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-17 02:31:38,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-17 02:31:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:38,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:38,205 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:38,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 02:31:38,408 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 202 times [2020-09-17 02:31:38,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:38,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961056575] [2020-09-17 02:31:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:38,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961056575] [2020-09-17 02:31:38,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318549328] [2020-09-17 02:31:38,702 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 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 [2020-09-17 02:31:38,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:39,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:39,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:39,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088863445] [2020-09-17 02:31:39,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:39,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:39,208 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-17 02:31:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:40,105 INFO L93 Difference]: Finished difference Result 236 states and 543 transitions. [2020-09-17 02:31:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:31:40,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:40,108 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:31:40,108 INFO L226 Difference]: Without dead ends: 234 [2020-09-17 02:31:40,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:31:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-17 02:31:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-17 02:31:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:31:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-17 02:31:40,112 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-17 02:31:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:40,112 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-17 02:31:40,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-17 02:31:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:40,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:40,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:40,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 02:31:40,313 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 203 times [2020-09-17 02:31:40,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:40,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98726926] [2020-09-17 02:31:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98726926] [2020-09-17 02:31:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905449956] [2020-09-17 02:31:40,597 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 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 [2020-09-17 02:31:40,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:31:40,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:40,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:40,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:41,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:41,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:41,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414135042] [2020-09-17 02:31:41,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:41,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:41,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:41,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:41,216 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-17 02:31:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:42,565 INFO L93 Difference]: Finished difference Result 241 states and 553 transitions. [2020-09-17 02:31:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:31:42,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:42,569 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:31:42,569 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:31:42,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:31:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:31:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-17 02:31:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:31:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-17 02:31:42,572 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-17 02:31:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:42,573 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-17 02:31:42,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-17 02:31:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:42,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:42,573 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:42,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 02:31:42,774 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 204 times [2020-09-17 02:31:42,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:42,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704206774] [2020-09-17 02:31:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704206774] [2020-09-17 02:31:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480984860] [2020-09-17 02:31:43,023 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 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 [2020-09-17 02:31:43,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:31:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:43,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:43,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:43,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946127980] [2020-09-17 02:31:43,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:43,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:43,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:43,596 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-17 02:31:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:44,659 INFO L93 Difference]: Finished difference Result 226 states and 520 transitions. [2020-09-17 02:31:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:31:44,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:44,662 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:31:44,663 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:31:44,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:31:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:31:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2020-09-17 02:31:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:31:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-17 02:31:44,666 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-17 02:31:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:44,666 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-17 02:31:44,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-17 02:31:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:44,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:44,667 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:44,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-17 02:31:44,868 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 205 times [2020-09-17 02:31:44,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:44,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246104449] [2020-09-17 02:31:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:45,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246104449] [2020-09-17 02:31:45,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726905445] [2020-09-17 02:31:45,139 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 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 [2020-09-17 02:31:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:45,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:45,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:45,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930643941] [2020-09-17 02:31:45,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:45,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:45,674 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-17 02:31:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:47,562 INFO L93 Difference]: Finished difference Result 253 states and 578 transitions. [2020-09-17 02:31:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:31:47,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:47,565 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:31:47,565 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:31:47,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=447, Invalid=1193, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:31:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:31:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2020-09-17 02:31:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:31:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-17 02:31:47,569 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-17 02:31:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:47,569 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-17 02:31:47,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-17 02:31:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:47,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:47,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:47,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 02:31:47,771 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 206 times [2020-09-17 02:31:47,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:47,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383142103] [2020-09-17 02:31:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:48,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383142103] [2020-09-17 02:31:48,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778524383] [2020-09-17 02:31:48,026 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 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 [2020-09-17 02:31:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:48,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:48,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:48,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026757523] [2020-09-17 02:31:48,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:48,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:48,510 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-17 02:31:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:50,306 INFO L93 Difference]: Finished difference Result 249 states and 570 transitions. [2020-09-17 02:31:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:31:50,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:50,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:50,310 INFO L225 Difference]: With dead ends: 249 [2020-09-17 02:31:50,310 INFO L226 Difference]: Without dead ends: 247 [2020-09-17 02:31:50,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:31:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-17 02:31:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2020-09-17 02:31:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:31:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-17 02:31:50,314 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-17 02:31:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:50,314 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-17 02:31:50,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-17 02:31:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:50,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:50,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:50,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:50,516 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 207 times [2020-09-17 02:31:50,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:50,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492180601] [2020-09-17 02:31:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:50,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492180601] [2020-09-17 02:31:50,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396366885] [2020-09-17 02:31:50,792 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 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 [2020-09-17 02:31:50,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:31:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:51,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:51,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:51,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752919961] [2020-09-17 02:31:51,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:51,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:51,598 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-17 02:31:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:53,632 INFO L93 Difference]: Finished difference Result 271 states and 615 transitions. [2020-09-17 02:31:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:31:53,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:53,636 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:31:53,636 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:31:53,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:31:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:31:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2020-09-17 02:31:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:31:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-17 02:31:53,639 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-17 02:31:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:53,639 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-17 02:31:53,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-17 02:31:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:53,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:53,640 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:53,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:53,841 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 208 times [2020-09-17 02:31:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:53,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867467007] [2020-09-17 02:31:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:54,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867467007] [2020-09-17 02:31:54,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269061089] [2020-09-17 02:31:54,071 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 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 [2020-09-17 02:31:54,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:54,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:54,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:54,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:54,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308721002] [2020-09-17 02:31:54,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:54,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:54,522 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-17 02:31:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:55,907 INFO L93 Difference]: Finished difference Result 241 states and 554 transitions. [2020-09-17 02:31:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:31:55,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:55,911 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:31:55,911 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:31:55,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:31:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:31:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-17 02:31:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:31:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-17 02:31:55,915 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-17 02:31:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:55,915 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-17 02:31:55,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-17 02:31:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:55,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:55,916 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:56,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:56,117 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 209 times [2020-09-17 02:31:56,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:56,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686297445] [2020-09-17 02:31:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686297445] [2020-09-17 02:31:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049840740] [2020-09-17 02:31:56,373 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 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 [2020-09-17 02:31:56,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:31:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:56,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:56,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:56,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188503267] [2020-09-17 02:31:56,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:56,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:56,850 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-17 02:31:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:58,901 INFO L93 Difference]: Finished difference Result 266 states and 612 transitions. [2020-09-17 02:31:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:31:58,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:58,905 INFO L225 Difference]: With dead ends: 266 [2020-09-17 02:31:58,905 INFO L226 Difference]: Without dead ends: 264 [2020-09-17 02:31:58,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:31:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-17 02:31:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-17 02:31:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:31:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-17 02:31:58,908 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-17 02:31:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:58,908 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-17 02:31:58,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-17 02:31:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:58,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:58,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:59,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:59,110 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 210 times [2020-09-17 02:31:59,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:59,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371946163] [2020-09-17 02:31:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:59,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371946163] [2020-09-17 02:31:59,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213214195] [2020-09-17 02:31:59,391 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 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 [2020-09-17 02:31:59,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:31:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:59,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:59,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:59,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934519171] [2020-09-17 02:31:59,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:59,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:59,946 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-17 02:32:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:01,973 INFO L93 Difference]: Finished difference Result 256 states and 592 transitions. [2020-09-17 02:32:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:32:01,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:01,977 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:32:01,977 INFO L226 Difference]: Without dead ends: 254 [2020-09-17 02:32:01,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:32:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-17 02:32:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2020-09-17 02:32:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:32:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-17 02:32:01,981 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-17 02:32:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:01,981 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-17 02:32:01,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-17 02:32:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:01,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:02,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:02,183 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 211 times [2020-09-17 02:32:02,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:02,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436368076] [2020-09-17 02:32:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:02,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436368076] [2020-09-17 02:32:02,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681007264] [2020-09-17 02:32:02,401 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 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 [2020-09-17 02:32:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:03,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:03,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:03,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452962211] [2020-09-17 02:32:03,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:03,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:03,065 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-17 02:32:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:05,161 INFO L93 Difference]: Finished difference Result 263 states and 606 transitions. [2020-09-17 02:32:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:32:05,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:05,166 INFO L225 Difference]: With dead ends: 263 [2020-09-17 02:32:05,166 INFO L226 Difference]: Without dead ends: 261 [2020-09-17 02:32:05,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:32:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-17 02:32:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 165. [2020-09-17 02:32:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:32:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-17 02:32:05,170 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-17 02:32:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:05,171 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-17 02:32:05,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-17 02:32:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:05,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:05,171 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:05,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 02:32:05,372 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 212 times [2020-09-17 02:32:05,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:05,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27972402] [2020-09-17 02:32:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:05,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27972402] [2020-09-17 02:32:05,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921432818] [2020-09-17 02:32:05,656 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 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 [2020-09-17 02:32:05,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:06,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:06,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:06,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077995262] [2020-09-17 02:32:06,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:06,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:06,237 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-17 02:32:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:08,825 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-17 02:32:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:32:08,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:08,829 INFO L225 Difference]: With dead ends: 266 [2020-09-17 02:32:08,829 INFO L226 Difference]: Without dead ends: 264 [2020-09-17 02:32:08,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:32:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-17 02:32:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2020-09-17 02:32:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:32:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-17 02:32:08,839 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-17 02:32:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:08,840 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-17 02:32:08,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-17 02:32:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:08,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:08,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:09,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 02:32:09,041 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 213 times [2020-09-17 02:32:09,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:09,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525890341] [2020-09-17 02:32:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:09,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525890341] [2020-09-17 02:32:09,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864957021] [2020-09-17 02:32:09,334 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 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 [2020-09-17 02:32:09,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:32:09,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:09,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:09,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:09,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525978896] [2020-09-17 02:32:09,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:09,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:09,926 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-17 02:32:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:12,119 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2020-09-17 02:32:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:32:12,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:12,124 INFO L225 Difference]: With dead ends: 250 [2020-09-17 02:32:12,124 INFO L226 Difference]: Without dead ends: 248 [2020-09-17 02:32:12,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=450, Invalid=1110, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:32:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-17 02:32:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 167. [2020-09-17 02:32:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:32:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:32:12,128 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:32:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:12,128 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:32:12,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:32:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:12,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:12,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:12,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 02:32:12,330 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 214 times [2020-09-17 02:32:12,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:12,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779743201] [2020-09-17 02:32:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:12,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779743201] [2020-09-17 02:32:12,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800317863] [2020-09-17 02:32:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:12,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:13,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:13,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:13,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851287109] [2020-09-17 02:32:13,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:13,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:13,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:13,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:13,169 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:32:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:15,573 INFO L93 Difference]: Finished difference Result 255 states and 608 transitions. [2020-09-17 02:32:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:32:15,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:15,578 INFO L225 Difference]: With dead ends: 255 [2020-09-17 02:32:15,578 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:32:15,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:32:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:32:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2020-09-17 02:32:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:32:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:32:15,583 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:32:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:15,583 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:32:15,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:32:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:15,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:15,584 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:15,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:15,784 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 215 times [2020-09-17 02:32:15,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:15,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647879282] [2020-09-17 02:32:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:16,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647879282] [2020-09-17 02:32:16,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233157411] [2020-09-17 02:32:16,063 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 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 [2020-09-17 02:32:16,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:32:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:16,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:16,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:16,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:16,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282903251] [2020-09-17 02:32:16,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:16,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:16,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:16,550 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:32:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:18,656 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2020-09-17 02:32:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:32:18,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:18,660 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:32:18,660 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:32:18,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=520, Invalid=1120, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:32:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:32:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 169. [2020-09-17 02:32:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:32:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:32:18,666 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:32:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:18,666 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:32:18,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:32:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:18,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:18,667 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:18,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 02:32:18,871 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 216 times [2020-09-17 02:32:18,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:18,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018563453] [2020-09-17 02:32:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:19,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018563453] [2020-09-17 02:32:19,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745520675] [2020-09-17 02:32:19,195 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 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 [2020-09-17 02:32:19,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:32:19,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:32:19,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:19,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:19,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:19,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447572174] [2020-09-17 02:32:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:19,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:19,602 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:32:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:21,912 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2020-09-17 02:32:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:32:21,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:21,915 INFO L225 Difference]: With dead ends: 276 [2020-09-17 02:32:21,915 INFO L226 Difference]: Without dead ends: 271 [2020-09-17 02:32:21,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:32:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-17 02:32:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 167. [2020-09-17 02:32:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:32:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:32:21,919 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:32:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:21,919 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:32:21,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:32:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:21,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:22,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-17 02:32:22,121 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 217 times [2020-09-17 02:32:22,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:22,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260013790] [2020-09-17 02:32:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:22,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260013790] [2020-09-17 02:32:22,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741040036] [2020-09-17 02:32:22,426 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 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 [2020-09-17 02:32:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:22,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:22,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:22,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559720377] [2020-09-17 02:32:22,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:22,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:22,968 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:32:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:25,290 INFO L93 Difference]: Finished difference Result 267 states and 637 transitions. [2020-09-17 02:32:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:32:25,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:25,293 INFO L225 Difference]: With dead ends: 267 [2020-09-17 02:32:25,293 INFO L226 Difference]: Without dead ends: 265 [2020-09-17 02:32:25,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:32:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-17 02:32:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 169. [2020-09-17 02:32:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:32:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:32:25,297 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:32:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:25,297 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:32:25,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:32:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:25,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:25,298 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:25,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:25,498 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 218 times [2020-09-17 02:32:25,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:25,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529116741] [2020-09-17 02:32:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:25,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529116741] [2020-09-17 02:32:25,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963316118] [2020-09-17 02:32:25,766 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 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 [2020-09-17 02:32:25,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:26,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:26,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:26,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:26,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093289163] [2020-09-17 02:32:26,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:26,297 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:32:27,677 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-09-17 02:32:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:29,866 INFO L93 Difference]: Finished difference Result 295 states and 712 transitions. [2020-09-17 02:32:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:32:29,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:29,870 INFO L225 Difference]: With dead ends: 295 [2020-09-17 02:32:29,870 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 02:32:29,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=628, Invalid=1534, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:32:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 02:32:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-17 02:32:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:32:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:32:29,874 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:32:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:29,875 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:32:29,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:32:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:29,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:29,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:30,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:30,076 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 219 times [2020-09-17 02:32:30,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:30,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689002310] [2020-09-17 02:32:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:30,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689002310] [2020-09-17 02:32:30,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870290308] [2020-09-17 02:32:30,393 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 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 [2020-09-17 02:32:30,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:32:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:32:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:30,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:30,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:32:30,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90473999] [2020-09-17 02:32:30,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:32:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:32:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:32:30,893 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 18 states. [2020-09-17 02:32:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:33,975 INFO L93 Difference]: Finished difference Result 303 states and 720 transitions. [2020-09-17 02:32:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:32:33,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-17 02:32:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:33,980 INFO L225 Difference]: With dead ends: 303 [2020-09-17 02:32:33,980 INFO L226 Difference]: Without dead ends: 298 [2020-09-17 02:32:33,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:32:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-17 02:32:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 165. [2020-09-17 02:32:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:32:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-17 02:32:33,984 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-17 02:32:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:33,984 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-17 02:32:33,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:32:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-17 02:32:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:33,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:33,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:34,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:34,186 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 220 times [2020-09-17 02:32:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:34,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517153041] [2020-09-17 02:32:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:34,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517153041] [2020-09-17 02:32:34,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382987392] [2020-09-17 02:32:34,476 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 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 [2020-09-17 02:32:34,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:35,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:35,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:35,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811504079] [2020-09-17 02:32:35,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:35,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:35,182 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-17 02:32:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:37,941 INFO L93 Difference]: Finished difference Result 283 states and 656 transitions. [2020-09-17 02:32:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:32:37,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:37,945 INFO L225 Difference]: With dead ends: 283 [2020-09-17 02:32:37,945 INFO L226 Difference]: Without dead ends: 281 [2020-09-17 02:32:37,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:32:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-17 02:32:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 169. [2020-09-17 02:32:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:32:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:32:37,954 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:32:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:37,954 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:32:37,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:32:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:37,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:37,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:38,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:38,156 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 221 times [2020-09-17 02:32:38,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:38,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959509741] [2020-09-17 02:32:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:38,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959509741] [2020-09-17 02:32:38,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313684511] [2020-09-17 02:32:38,416 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 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 [2020-09-17 02:32:38,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:32:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:39,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:39,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:39,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262228999] [2020-09-17 02:32:39,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:39,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:39,003 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:32:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:42,090 INFO L93 Difference]: Finished difference Result 278 states and 665 transitions. [2020-09-17 02:32:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:32:42,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:42,095 INFO L225 Difference]: With dead ends: 278 [2020-09-17 02:32:42,095 INFO L226 Difference]: Without dead ends: 276 [2020-09-17 02:32:42,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:32:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-17 02:32:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 174. [2020-09-17 02:32:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-17 02:32:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-17 02:32:42,104 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-17 02:32:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:42,104 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-17 02:32:42,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-17 02:32:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:42,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:42,108 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:42,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-17 02:32:42,319 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:42,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 222 times [2020-09-17 02:32:42,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:42,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254445555] [2020-09-17 02:32:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:42,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254445555] [2020-09-17 02:32:42,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765531361] [2020-09-17 02:32:42,645 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 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 [2020-09-17 02:32:42,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:32:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:43,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:43,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:43,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:43,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900457024] [2020-09-17 02:32:43,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:43,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:43,321 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-17 02:32:45,596 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-09-17 02:32:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:47,284 INFO L93 Difference]: Finished difference Result 318 states and 774 transitions. [2020-09-17 02:32:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:32:47,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:47,289 INFO L225 Difference]: With dead ends: 318 [2020-09-17 02:32:47,289 INFO L226 Difference]: Without dead ends: 310 [2020-09-17 02:32:47,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=644, Invalid=1612, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:32:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-17 02:32:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 176. [2020-09-17 02:32:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-17 02:32:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-17 02:32:47,294 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-17 02:32:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:47,295 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-17 02:32:47,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-17 02:32:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:47,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:47,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-17 02:32:47,501 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 223 times [2020-09-17 02:32:47,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:47,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007873043] [2020-09-17 02:32:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007873043] [2020-09-17 02:32:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661938190] [2020-09-17 02:32:47,809 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 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 [2020-09-17 02:32:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:52,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:52,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:52,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:52,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919438564] [2020-09-17 02:32:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:52,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:52,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:52,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=199, Unknown=2, NotChecked=0, Total=272 [2020-09-17 02:32:52,437 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-17 02:32:52,730 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2020-09-17 02:32:57,751 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-17 02:33:01,955 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-17 02:33:06,461 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-17 02:33:10,927 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-17 02:33:11,084 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-09-17 02:33:15,304 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-17 02:33:20,055 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-17 02:33:22,826 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-17 02:33:27,474 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-17 02:33:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:28,014 INFO L93 Difference]: Finished difference Result 316 states and 769 transitions. [2020-09-17 02:33:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:33:28,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:28,019 INFO L225 Difference]: With dead ends: 316 [2020-09-17 02:33:28,019 INFO L226 Difference]: Without dead ends: 308 [2020-09-17 02:33:28,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=664, Invalid=1686, Unknown=2, NotChecked=0, Total=2352 [2020-09-17 02:33:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-17 02:33:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 171. [2020-09-17 02:33:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:33:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-17 02:33:28,024 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-17 02:33:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:28,025 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-17 02:33:28,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-17 02:33:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:28,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:28,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:28,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-17 02:33:28,239 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 224 times [2020-09-17 02:33:28,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:28,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507529301] [2020-09-17 02:33:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:28,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507529301] [2020-09-17 02:33:28,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706110229] [2020-09-17 02:33:28,566 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 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 [2020-09-17 02:33:28,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:28,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:29,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:29,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:29,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:29,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752768808] [2020-09-17 02:33:29,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:29,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:29,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:29,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:29,126 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-17 02:33:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:33,317 INFO L93 Difference]: Finished difference Result 318 states and 769 transitions. [2020-09-17 02:33:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:33:33,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:33,322 INFO L225 Difference]: With dead ends: 318 [2020-09-17 02:33:33,322 INFO L226 Difference]: Without dead ends: 310 [2020-09-17 02:33:33,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:33:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-17 02:33:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 170. [2020-09-17 02:33:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-17 02:33:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-17 02:33:33,325 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-17 02:33:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:33,326 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-17 02:33:33,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-17 02:33:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:33,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:33,326 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:33,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-17 02:33:33,531 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 225 times [2020-09-17 02:33:33,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:33,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588354141] [2020-09-17 02:33:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588354141] [2020-09-17 02:33:33,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924687863] [2020-09-17 02:33:33,840 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 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 [2020-09-17 02:33:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:34,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:34,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90000044] [2020-09-17 02:33:34,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:34,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:34,296 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-17 02:33:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:36,284 INFO L93 Difference]: Finished difference Result 261 states and 613 transitions. [2020-09-17 02:33:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:33:36,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:36,289 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:33:36,289 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:33:36,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:33:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:33:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2020-09-17 02:33:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-17 02:33:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-17 02:33:36,292 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-17 02:33:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:36,292 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-17 02:33:36,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-17 02:33:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:36,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:36,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:36,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-17 02:33:36,494 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 226 times [2020-09-17 02:33:36,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:36,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091333897] [2020-09-17 02:33:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:36,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091333897] [2020-09-17 02:33:36,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672020150] [2020-09-17 02:33:36,773 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 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 [2020-09-17 02:33:36,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:36,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:37,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:37,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676192281] [2020-09-17 02:33:37,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:37,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:37,293 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-17 02:33:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:40,043 INFO L93 Difference]: Finished difference Result 280 states and 660 transitions. [2020-09-17 02:33:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:33:40,046 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:40,046 INFO L225 Difference]: With dead ends: 280 [2020-09-17 02:33:40,047 INFO L226 Difference]: Without dead ends: 278 [2020-09-17 02:33:40,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:33:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-17 02:33:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-17 02:33:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:33:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-17 02:33:40,050 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-17 02:33:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:40,050 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-17 02:33:40,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-17 02:33:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:40,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:40,051 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:40,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:40,252 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 227 times [2020-09-17 02:33:40,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:40,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076161612] [2020-09-17 02:33:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:40,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076161612] [2020-09-17 02:33:40,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771268139] [2020-09-17 02:33:40,539 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 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 [2020-09-17 02:33:40,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:33:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:41,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:41,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32218545] [2020-09-17 02:33:41,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:41,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:41,002 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-17 02:33:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:43,138 INFO L93 Difference]: Finished difference Result 251 states and 596 transitions. [2020-09-17 02:33:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:33:43,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:43,143 INFO L225 Difference]: With dead ends: 251 [2020-09-17 02:33:43,143 INFO L226 Difference]: Without dead ends: 249 [2020-09-17 02:33:43,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:33:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-17 02:33:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2020-09-17 02:33:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:33:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-17 02:33:43,152 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-17 02:33:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:43,152 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-17 02:33:43,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-17 02:33:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:43,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:43,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:43,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:43,354 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 228 times [2020-09-17 02:33:43,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:43,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254477323] [2020-09-17 02:33:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:43,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254477323] [2020-09-17 02:33:43,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045464227] [2020-09-17 02:33:43,705 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 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 [2020-09-17 02:33:43,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:33:43,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:43,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:43,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:44,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:44,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843651201] [2020-09-17 02:33:44,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:44,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:44,305 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-17 02:33:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:47,531 INFO L93 Difference]: Finished difference Result 269 states and 647 transitions. [2020-09-17 02:33:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:33:47,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:47,535 INFO L225 Difference]: With dead ends: 269 [2020-09-17 02:33:47,535 INFO L226 Difference]: Without dead ends: 267 [2020-09-17 02:33:47,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=599, Invalid=1563, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:33:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-17 02:33:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 166. [2020-09-17 02:33:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:33:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:33:47,538 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:33:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:47,538 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:33:47,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:33:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:47,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:47,539 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:47,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:47,740 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 229 times [2020-09-17 02:33:47,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:47,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908200883] [2020-09-17 02:33:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908200883] [2020-09-17 02:33:48,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550584081] [2020-09-17 02:33:48,010 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 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 [2020-09-17 02:33:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:48,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:48,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026141353] [2020-09-17 02:33:48,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:48,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:48,451 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:33:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:51,511 INFO L93 Difference]: Finished difference Result 280 states and 682 transitions. [2020-09-17 02:33:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:33:51,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:51,516 INFO L225 Difference]: With dead ends: 280 [2020-09-17 02:33:51,516 INFO L226 Difference]: Without dead ends: 272 [2020-09-17 02:33:51,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:33:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-17 02:33:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 166. [2020-09-17 02:33:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:33:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:33:51,520 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:33:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:51,521 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:33:51,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:33:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:51,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:51,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:51,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:51,725 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 230 times [2020-09-17 02:33:51,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:51,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682236947] [2020-09-17 02:33:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:52,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682236947] [2020-09-17 02:33:52,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127806937] [2020-09-17 02:33:52,009 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 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 [2020-09-17 02:33:52,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:52,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:52,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334641940] [2020-09-17 02:33:52,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:52,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:52,557 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:33:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:56,077 INFO L93 Difference]: Finished difference Result 284 states and 697 transitions. [2020-09-17 02:33:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:33:56,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:56,081 INFO L225 Difference]: With dead ends: 284 [2020-09-17 02:33:56,081 INFO L226 Difference]: Without dead ends: 276 [2020-09-17 02:33:56,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:33:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-17 02:33:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2020-09-17 02:33:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:33:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-17 02:33:56,085 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-17 02:33:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:56,085 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-17 02:33:56,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-17 02:33:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:56,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:56,086 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:56,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:56,287 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 231 times [2020-09-17 02:33:56,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:56,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727195028] [2020-09-17 02:33:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:56,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727195028] [2020-09-17 02:33:56,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135925045] [2020-09-17 02:33:56,571 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 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 [2020-09-17 02:33:56,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:57,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:57,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:57,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087674482] [2020-09-17 02:33:57,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:57,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:57,051 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-17 02:33:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:59,497 INFO L93 Difference]: Finished difference Result 261 states and 630 transitions. [2020-09-17 02:33:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:33:59,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:59,501 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:33:59,502 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:33:59,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:33:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:33:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2020-09-17 02:33:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:33:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:33:59,506 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:33:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:59,506 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:33:59,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:33:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:59,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:59,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:59,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:59,708 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 232 times [2020-09-17 02:33:59,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:59,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421492246] [2020-09-17 02:33:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:00,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421492246] [2020-09-17 02:34:00,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213891957] [2020-09-17 02:34:00,044 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 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 [2020-09-17 02:34:00,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:00,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:00,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:00,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:00,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48908297] [2020-09-17 02:34:00,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:00,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:00,522 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:34:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:03,387 INFO L93 Difference]: Finished difference Result 278 states and 682 transitions. [2020-09-17 02:34:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:34:03,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:03,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:03,390 INFO L225 Difference]: With dead ends: 278 [2020-09-17 02:34:03,390 INFO L226 Difference]: Without dead ends: 270 [2020-09-17 02:34:03,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:34:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-17 02:34:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2020-09-17 02:34:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:34:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-17 02:34:03,393 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-17 02:34:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:03,393 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-17 02:34:03,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-17 02:34:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:03,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:03,398 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:03,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:03,599 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 233 times [2020-09-17 02:34:03,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:03,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067574656] [2020-09-17 02:34:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:03,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067574656] [2020-09-17 02:34:03,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993635424] [2020-09-17 02:34:03,936 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 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 [2020-09-17 02:34:03,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:34:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:04,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:04,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:04,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:04,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291907239] [2020-09-17 02:34:04,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:04,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:04,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:04,432 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-17 02:34:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:07,933 INFO L93 Difference]: Finished difference Result 294 states and 716 transitions. [2020-09-17 02:34:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:34:07,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:07,939 INFO L225 Difference]: With dead ends: 294 [2020-09-17 02:34:07,939 INFO L226 Difference]: Without dead ends: 286 [2020-09-17 02:34:07,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=634, Invalid=1718, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:34:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-17 02:34:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 157. [2020-09-17 02:34:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:34:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-17 02:34:07,943 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-17 02:34:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:07,943 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-17 02:34:07,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-17 02:34:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:07,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:07,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:08,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-17 02:34:08,145 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:08,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 234 times [2020-09-17 02:34:08,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:08,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125283414] [2020-09-17 02:34:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:08,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125283414] [2020-09-17 02:34:08,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834419894] [2020-09-17 02:34:08,459 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 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 [2020-09-17 02:34:08,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:34:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:08,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:08,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:08,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:08,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980902720] [2020-09-17 02:34:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:08,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:08,952 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-17 02:34:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:12,664 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2020-09-17 02:34:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:34:12,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:12,667 INFO L225 Difference]: With dead ends: 270 [2020-09-17 02:34:12,668 INFO L226 Difference]: Without dead ends: 262 [2020-09-17 02:34:12,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=648, Invalid=1704, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:34:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-17 02:34:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2020-09-17 02:34:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-17 02:34:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-17 02:34:12,671 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-17 02:34:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:12,672 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-17 02:34:12,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-17 02:34:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:12,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:12,672 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:12,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:12,873 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:12,874 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 235 times [2020-09-17 02:34:12,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:12,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471546274] [2020-09-17 02:34:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:13,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471546274] [2020-09-17 02:34:13,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829417799] [2020-09-17 02:34:13,210 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 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 [2020-09-17 02:34:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:13,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:13,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:13,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95678911] [2020-09-17 02:34:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:13,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:13,855 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-17 02:34:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:15,688 INFO L93 Difference]: Finished difference Result 235 states and 538 transitions. [2020-09-17 02:34:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:15,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:15,693 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:34:15,693 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:34:15,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:34:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 153. [2020-09-17 02:34:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-17 02:34:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-17 02:34:15,696 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-17 02:34:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:15,696 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-17 02:34:15,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-17 02:34:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:15,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:15,697 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:15,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-17 02:34:15,898 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 236 times [2020-09-17 02:34:15,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:15,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021967390] [2020-09-17 02:34:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021967390] [2020-09-17 02:34:16,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656491812] [2020-09-17 02:34:16,231 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 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 [2020-09-17 02:34:16,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:16,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:16,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985203390] [2020-09-17 02:34:16,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:16,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:16,849 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-17 02:34:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:18,436 INFO L93 Difference]: Finished difference Result 227 states and 520 transitions. [2020-09-17 02:34:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:34:18,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:18,444 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:34:18,444 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:34:18,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:34:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:34:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 151. [2020-09-17 02:34:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-17 02:34:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-17 02:34:18,447 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-17 02:34:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:18,448 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-17 02:34:18,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-17 02:34:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:18,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:18,448 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:18,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-17 02:34:18,649 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 237 times [2020-09-17 02:34:18,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:18,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496615888] [2020-09-17 02:34:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:18,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496615888] [2020-09-17 02:34:18,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653932772] [2020-09-17 02:34:18,988 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 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 [2020-09-17 02:34:19,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:34:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:19,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:19,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:34:19,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538539970] [2020-09-17 02:34:19,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:19,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:19,615 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-17 02:34:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:21,861 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2020-09-17 02:34:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:34:21,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:34:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:21,866 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:34:21,866 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:34:21,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:34:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2020-09-17 02:34:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-17 02:34:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-17 02:34:21,870 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-17 02:34:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:21,871 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-17 02:34:21,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-17 02:34:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:34:21,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:21,871 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:22,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:22,072 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 238 times [2020-09-17 02:34:22,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:22,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872990115] [2020-09-17 02:34:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:22,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872990115] [2020-09-17 02:34:22,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147385465] [2020-09-17 02:34:22,423 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 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 [2020-09-17 02:34:22,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:34:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:22,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:25,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:25,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:34:25,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891024948] [2020-09-17 02:34:25,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:25,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2020-09-17 02:34:25,039 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-17 02:34:35,157 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2020-09-17 02:35:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:15,495 INFO L93 Difference]: Finished difference Result 274 states and 638 transitions. [2020-09-17 02:35:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:35:15,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-17 02:35:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:15,500 INFO L225 Difference]: With dead ends: 274 [2020-09-17 02:35:15,500 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:35:15,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=522, Invalid=1280, Unknown=4, NotChecked=0, Total=1806 [2020-09-17 02:35:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:35:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 150. [2020-09-17 02:35:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-17 02:35:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-17 02:35:15,504 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-17 02:35:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:15,504 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-17 02:35:15,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-17 02:35:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:15,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:15,505 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:15,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-17 02:35:15,706 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 239 times [2020-09-17 02:35:15,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:15,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851295365] [2020-09-17 02:35:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851295365] [2020-09-17 02:35:16,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334966881] [2020-09-17 02:35:16,009 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 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 [2020-09-17 02:35:16,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:16,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:16,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:16,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:35:16,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560419588] [2020-09-17 02:35:16,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:35:16,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:35:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:16,485 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-17 02:35:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:19,207 INFO L93 Difference]: Finished difference Result 241 states and 562 transitions. [2020-09-17 02:35:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:35:19,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:35:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:19,212 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:35:19,213 INFO L226 Difference]: Without dead ends: 236 [2020-09-17 02:35:19,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:35:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-17 02:35:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 146. [2020-09-17 02:35:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:35:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-17 02:35:19,216 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-17 02:35:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:19,217 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-17 02:35:19,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:35:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-17 02:35:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:19,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:19,217 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:19,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:19,418 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:19,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-17 02:35:19,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:19,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494793499] [2020-09-17 02:35:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494793499] [2020-09-17 02:35:19,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104998139] [2020-09-17 02:35:19,847 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 [2020-09-17 02:35:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:20,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:20,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-17 02:35:20,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203548431] [2020-09-17 02:35:20,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:20,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:20,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:20,719 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-17 02:35:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:21,615 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-17 02:35:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:21,621 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-17 02:35:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:21,622 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:35:21,622 INFO L226 Difference]: Without dead ends: 201 [2020-09-17 02:35:21,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-17 02:35:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-17 02:35:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:35:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-17 02:35:21,626 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-17 02:35:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:21,627 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-17 02:35:21,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-17 02:35:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:21,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:21,627 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:21,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:21,828 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-17 02:35:21,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:21,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879017967] [2020-09-17 02:35:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879017967] [2020-09-17 02:35:22,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131527490] [2020-09-17 02:35:22,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:22,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:22,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:22,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:22,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:35:22,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198238030] [2020-09-17 02:35:22,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:22,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:22,933 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-17 02:35:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:23,871 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2020-09-17 02:35:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:23,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:35:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:23,877 INFO L225 Difference]: With dead ends: 208 [2020-09-17 02:35:23,877 INFO L226 Difference]: Without dead ends: 205 [2020-09-17 02:35:23,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-17 02:35:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2020-09-17 02:35:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:35:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-17 02:35:23,881 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-17 02:35:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:23,881 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-17 02:35:23,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-17 02:35:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:23,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:23,882 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:24,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:24,083 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-17 02:35:24,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:24,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156687318] [2020-09-17 02:35:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:24,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156687318] [2020-09-17 02:35:24,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26162448] [2020-09-17 02:35:24,459 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 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