/usr/bin/java -Xmx15000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/threadmodular/regression/numbered-array/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:51:13,987 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:51:14,035 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/ThreadModularVerifier.Settings.epf [2023-07-03 22:51:14,042 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:51:14,048 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:51:14,048 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:51:14,048 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:51:14,049 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:51:14,049 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:51:14,051 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-07-03 22:51:14,051 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-07-03 22:51:14,052 INFO L137 SettingsManager]: * Assume program has a precondition=false [2023-07-03 22:51:14,052 INFO L137 SettingsManager]: * Conditional Independence=PRECOMPUTED_CONDITIONS [2023-07-03 22:51:14,052 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:51:14,054 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:51:14,054 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:51:14,054 INFO L137 SettingsManager]: * File name=CHC_conditional WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:51:14,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:51:14,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:51:14,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:51:14,314 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:51:14,315 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:51:14,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl [2023-07-03 22:51:14,319 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl' [2023-07-03 22:51:14,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:51:14,340 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:51:14,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:51:14,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:51:14,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:51:14,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:51:14,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:51:14,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:51:14,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:51:14,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:51:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:51:14,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:51:14,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-07-03 22:51:14,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:51:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:51:14,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:51:14,483 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:51:14,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:51:14,546 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:51:14,563 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:51:14,563 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:51:14,566 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:14 BoogieIcfgContainer [2023-07-03 22:51:14,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:51:14,567 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:51:14,567 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:51:14,568 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:51:14,569 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:14" (1/1) ... [2023-07-03 22:51:14,781 INFO L180 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'assume true;' is: true [2023-07-03 22:51:14,790 INFO L180 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'assume true;' is: true [2023-07-03 22:51:14,797 INFO L180 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'a := a[id := id];' is: true [2023-07-03 22:51:14,894 INFO L180 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'id := ctr;ctr := ctr + 1;' is: false [2023-07-03 22:51:14,920 INFO L180 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'assume true;' is: true [2023-07-03 22:51:14,922 INFO L180 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'assume true;' is: true [2023-07-03 22:51:14,924 INFO L180 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'a := a[id := id];' is: true [2023-07-03 22:51:14,936 INFO L180 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'id := ctr;ctr := ctr + 1;' is: true [2023-07-03 22:51:14,943 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:14,945 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:14,947 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'a := a[id := id];' is: true [2023-07-03 22:51:14,954 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'id := ctr;ctr := ctr + 1;' is: true [2023-07-03 22:51:14,965 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:14,969 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:14,974 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'a := a[id := id];' is: true [2023-07-03 22:51:14,989 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'id := ctr;ctr := ctr + 1;' is: true [2023-07-03 22:51:15,052 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:15 HornClauseAST [2023-07-03 22:51:15,052 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:51:15,053 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:51:15,053 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:51:15,053 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:51:15,054 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,054 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/CHC_conditional_numbered-array.bpl_UID9270877213998128706.smt2 [2023-07-03 22:51:15,071 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:51:15,072 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:51:15,072 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:51:15,073 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:51:15,080 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,097 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15 Unit [2023-07-03 22:51:15,097 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:51:15,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:51:15,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:51:15,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:51:15,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,111 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:51:15,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:51:15,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:51:15,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:51:15,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (1/1) ... [2023-07-03 22:51:15,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:51:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:51:15,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:51:15,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-07-03 22:51:15,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:51:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:51:15,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:51:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:51:15,140 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:51:15,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:51:15,394 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:51:15,396 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:51:15,396 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:51:15,396 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:15 BoogieIcfgContainer [2023-07-03 22:51:15,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:51:15,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:51:15,398 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:51:15,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:51:15,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:14" (1/5) ... [2023-07-03 22:51:15,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cbcaf4 and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:51:15, skipping insertion in model container [2023-07-03 22:51:15,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:14" (2/5) ... [2023-07-03 22:51:15,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cbcaf4 and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:51:15, skipping insertion in model container [2023-07-03 22:51:15,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:15" (3/5) ... [2023-07-03 22:51:15,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cbcaf4 and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:51:15, skipping insertion in model container [2023-07-03 22:51:15,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:15" (4/5) ... [2023-07-03 22:51:15,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cbcaf4 and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:51:15, skipping insertion in model container [2023-07-03 22:51:15,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:15" (5/5) ... [2023-07-03 22:51:15,405 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:51:15,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:51:15,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:51:15,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:51:15,458 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@636ccc1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:51:15,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:51:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-07-03 22:51:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:51:15,473 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:15,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:15,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:15,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1069968571, now seen corresponding path program 1 times [2023-07-03 22:51:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894690462] [2023-07-03 22:51:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:15,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:15,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:15,643 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894690462] [2023-07-03 22:51:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894690462] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:15,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117965229] [2023-07-03 22:51:15,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:15,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:15,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:15,683 INFO L87 Difference]: Start difference. First operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:16,042 INFO L93 Difference]: Finished difference Result 154 states and 244 transitions. [2023-07-03 22:51:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-07-03 22:51:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:16,077 INFO L225 Difference]: With dead ends: 154 [2023-07-03 22:51:16,077 INFO L226 Difference]: Without dead ends: 152 [2023-07-03 22:51:16,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:16,087 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 201 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:16,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 178 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-07-03 22:51:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-07-03 22:51:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 100 states have (on average 1.44) internal successors, (144), 100 states have internal predecessors, (144), 49 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-07-03 22:51:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 242 transitions. [2023-07-03 22:51:16,158 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 242 transitions. Word has length 8 [2023-07-03 22:51:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:16,159 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 242 transitions. [2023-07-03 22:51:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 242 transitions. [2023-07-03 22:51:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:51:16,170 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:16,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:51:16,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:16,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1186800959, now seen corresponding path program 1 times [2023-07-03 22:51:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:16,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634194922] [2023-07-03 22:51:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:16,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:16,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:16,226 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634194922] [2023-07-03 22:51:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [634194922] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:16,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:16,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369989598] [2023-07-03 22:51:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:16,230 INFO L87 Difference]: Start difference. First operand 152 states and 242 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:16,457 INFO L93 Difference]: Finished difference Result 258 states and 432 transitions. [2023-07-03 22:51:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:51:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:16,463 INFO L225 Difference]: With dead ends: 258 [2023-07-03 22:51:16,464 INFO L226 Difference]: Without dead ends: 258 [2023-07-03 22:51:16,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:16,465 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 33 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:16,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 382 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-07-03 22:51:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2023-07-03 22:51:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.5333333333333334) internal successors, (230), 150 states have internal predecessors, (230), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-07-03 22:51:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 392 transitions. [2023-07-03 22:51:16,495 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 392 transitions. Word has length 10 [2023-07-03 22:51:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:16,496 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 392 transitions. [2023-07-03 22:51:16,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 392 transitions. [2023-07-03 22:51:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:51:16,504 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:16,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:16,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:51:16,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:16,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash 560059075, now seen corresponding path program 1 times [2023-07-03 22:51:16,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:16,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488315227] [2023-07-03 22:51:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:16,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:16,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:16,541 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:16,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488315227] [2023-07-03 22:51:16,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [488315227] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:16,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:16,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953378838] [2023-07-03 22:51:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:16,554 INFO L87 Difference]: Start difference. First operand 234 states and 392 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:16,804 INFO L93 Difference]: Finished difference Result 374 states and 682 transitions. [2023-07-03 22:51:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:51:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:16,814 INFO L225 Difference]: With dead ends: 374 [2023-07-03 22:51:16,815 INFO L226 Difference]: Without dead ends: 374 [2023-07-03 22:51:16,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:16,816 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 25 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 362 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-07-03 22:51:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 254. [2023-07-03 22:51:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 170 states have (on average 1.8823529411764706) internal successors, (320), 170 states have internal predecessors, (320), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-07-03 22:51:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 482 transitions. [2023-07-03 22:51:16,874 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 482 transitions. Word has length 10 [2023-07-03 22:51:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:16,875 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 482 transitions. [2023-07-03 22:51:16,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 482 transitions. [2023-07-03 22:51:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:51:16,886 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:16,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:16,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:51:16,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:16,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash 322826237, now seen corresponding path program 1 times [2023-07-03 22:51:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:16,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845799951] [2023-07-03 22:51:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:16,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:16,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:16,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:16,956 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:16,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845799951] [2023-07-03 22:51:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [845799951] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:16,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099590297] [2023-07-03 22:51:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:16,958 INFO L87 Difference]: Start difference. First operand 254 states and 482 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:17,162 INFO L93 Difference]: Finished difference Result 362 states and 712 transitions. [2023-07-03 22:51:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:51:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:17,173 INFO L225 Difference]: With dead ends: 362 [2023-07-03 22:51:17,173 INFO L226 Difference]: Without dead ends: 362 [2023-07-03 22:51:17,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:17,174 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 35 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:17,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 380 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-07-03 22:51:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 338. [2023-07-03 22:51:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 222 states have (on average 2.009009009009009) internal successors, (446), 222 states have internal predecessors, (446), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-07-03 22:51:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 672 transitions. [2023-07-03 22:51:17,222 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 672 transitions. Word has length 13 [2023-07-03 22:51:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:17,223 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 672 transitions. [2023-07-03 22:51:17,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 672 transitions. [2023-07-03 22:51:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:51:17,234 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:17,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:51:17,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:17,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash -200925096, now seen corresponding path program 1 times [2023-07-03 22:51:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:17,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194569990] [2023-07-03 22:51:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:17,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:17,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:17,291 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:17,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194569990] [2023-07-03 22:51:17,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [194569990] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:17,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:17,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:17,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399297472] [2023-07-03 22:51:17,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:17,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:17,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:17,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:17,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:17,294 INFO L87 Difference]: Start difference. First operand 338 states and 672 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:17,505 INFO L93 Difference]: Finished difference Result 528 states and 1086 transitions. [2023-07-03 22:51:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:51:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:17,528 INFO L225 Difference]: With dead ends: 528 [2023-07-03 22:51:17,528 INFO L226 Difference]: Without dead ends: 528 [2023-07-03 22:51:17,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:17,530 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 27 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:17,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 360 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-07-03 22:51:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 360. [2023-07-03 22:51:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 244 states have (on average 2.377049180327869) internal successors, (580), 244 states have internal predecessors, (580), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-07-03 22:51:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 806 transitions. [2023-07-03 22:51:17,575 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 806 transitions. Word has length 13 [2023-07-03 22:51:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:17,575 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 806 transitions. [2023-07-03 22:51:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 806 transitions. [2023-07-03 22:51:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:51:17,593 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:17,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:51:17,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:17,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1618119312, now seen corresponding path program 1 times [2023-07-03 22:51:17,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:17,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091671952] [2023-07-03 22:51:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:17,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-07-03 22:51:17,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:51:17,678 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091671952] [2023-07-03 22:51:17,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091671952] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:17,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:17,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191020476] [2023-07-03 22:51:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:17,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:17,680 INFO L87 Difference]: Start difference. First operand 360 states and 806 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:17,869 INFO L93 Difference]: Finished difference Result 478 states and 1038 transitions. [2023-07-03 22:51:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:51:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:17,883 INFO L225 Difference]: With dead ends: 478 [2023-07-03 22:51:17,884 INFO L226 Difference]: Without dead ends: 478 [2023-07-03 22:51:17,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:17,885 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 30 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:17,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 388 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-07-03 22:51:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 440. [2023-07-03 22:51:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 300 states have (on average 2.34) internal successors, (702), 300 states have internal predecessors, (702), 137 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2023-07-03 22:51:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 976 transitions. [2023-07-03 22:51:17,915 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 976 transitions. Word has length 16 [2023-07-03 22:51:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:17,916 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 976 transitions. [2023-07-03 22:51:17,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 976 transitions. [2023-07-03 22:51:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:51:17,937 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:17,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:51:17,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:17,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash -972031662, now seen corresponding path program 1 times [2023-07-03 22:51:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:17,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496422992] [2023-07-03 22:51:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:17,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-07-03 22:51:17,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:51:18,006 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496422992] [2023-07-03 22:51:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [496422992] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:18,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:18,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:18,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268241951] [2023-07-03 22:51:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:18,008 INFO L87 Difference]: Start difference. First operand 440 states and 976 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:18,187 INFO L93 Difference]: Finished difference Result 594 states and 1276 transitions. [2023-07-03 22:51:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:51:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:18,205 INFO L225 Difference]: With dead ends: 594 [2023-07-03 22:51:18,205 INFO L226 Difference]: Without dead ends: 594 [2023-07-03 22:51:18,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:18,206 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 24 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:18,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 379 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-07-03 22:51:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-07-03 22:51:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 472. [2023-07-03 22:51:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 332 states have (on average 2.4096385542168677) internal successors, (800), 332 states have internal predecessors, (800), 137 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2023-07-03 22:51:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1074 transitions. [2023-07-03 22:51:18,250 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1074 transitions. Word has length 16 [2023-07-03 22:51:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:18,250 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 1074 transitions. [2023-07-03 22:51:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1074 transitions. [2023-07-03 22:51:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:51:18,299 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:18,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:18,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:51:18,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:18,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -470865985, now seen corresponding path program 1 times [2023-07-03 22:51:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:18,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506498043] [2023-07-03 22:51:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:18,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:18,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2023-07-03 22:51:18,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:51:18,422 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506498043] [2023-07-03 22:51:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506498043] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:18,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:18,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-07-03 22:51:18,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056491811] [2023-07-03 22:51:18,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-07-03 22:51:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-07-03 22:51:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:18,424 INFO L87 Difference]: Start difference. First operand 472 states and 1074 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:18,925 INFO L93 Difference]: Finished difference Result 606 states and 1356 transitions. [2023-07-03 22:51:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-07-03 22:51:18,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:51:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:18,940 INFO L225 Difference]: With dead ends: 606 [2023-07-03 22:51:18,941 INFO L226 Difference]: Without dead ends: 606 [2023-07-03 22:51:18,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:51:18,942 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 30 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:18,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 451 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:51:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-07-03 22:51:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 492. [2023-07-03 22:51:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 344 states have (on average 2.36046511627907) internal successors, (812), 344 states have internal predecessors, (812), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-07-03 22:51:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1102 transitions. [2023-07-03 22:51:18,976 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1102 transitions. Word has length 22 [2023-07-03 22:51:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:18,976 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1102 transitions. [2023-07-03 22:51:18,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1102 transitions. [2023-07-03 22:51:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:51:19,010 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:19,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:51:19,010 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:19,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1264013885, now seen corresponding path program 1 times [2023-07-03 22:51:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149897505] [2023-07-03 22:51:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:19,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-07-03 22:51:19,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:51:19,060 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149897505] [2023-07-03 22:51:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [149897505] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-07-03 22:51:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653055476] [2023-07-03 22:51:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-07-03 22:51:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-07-03 22:51:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:19,062 INFO L87 Difference]: Start difference. First operand 492 states and 1102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:19,421 INFO L93 Difference]: Finished difference Result 752 states and 1860 transitions. [2023-07-03 22:51:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-07-03 22:51:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:51:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:19,454 INFO L225 Difference]: With dead ends: 752 [2023-07-03 22:51:19,455 INFO L226 Difference]: Without dead ends: 752 [2023-07-03 22:51:19,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:19,457 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 34 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:19,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 307 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-07-03 22:51:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 494. [2023-07-03 22:51:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 346 states have (on average 2.4566473988439306) internal successors, (850), 346 states have internal predecessors, (850), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-07-03 22:51:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1140 transitions. [2023-07-03 22:51:19,510 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1140 transitions. Word has length 22 [2023-07-03 22:51:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:19,510 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1140 transitions. [2023-07-03 22:51:19,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1140 transitions. [2023-07-03 22:51:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:51:19,542 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:19,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:51:19,542 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:19,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1016456315, now seen corresponding path program 2 times [2023-07-03 22:51:19,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:19,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8308877] [2023-07-03 22:51:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:19,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:19,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2023-07-03 22:51:19,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:51:19,588 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8308877] [2023-07-03 22:51:19,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [8308877] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:19,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:19,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412019072] [2023-07-03 22:51:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:19,590 INFO L87 Difference]: Start difference. First operand 494 states and 1140 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:19,763 INFO L93 Difference]: Finished difference Result 438 states and 980 transitions. [2023-07-03 22:51:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:51:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:19,772 INFO L225 Difference]: With dead ends: 438 [2023-07-03 22:51:19,772 INFO L226 Difference]: Without dead ends: 438 [2023-07-03 22:51:19,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:19,773 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 4 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:19,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 267 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-07-03 22:51:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2023-07-03 22:51:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 298 states have (on average 2.3959731543624163) internal successors, (714), 298 states have internal predecessors, (714), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-07-03 22:51:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 940 transitions. [2023-07-03 22:51:19,800 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 940 transitions. Word has length 22 [2023-07-03 22:51:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:19,800 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 940 transitions. [2023-07-03 22:51:19,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 940 transitions. [2023-07-03 22:51:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:19,823 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:19,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:51:19,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:19,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1103452888, now seen corresponding path program 1 times [2023-07-03 22:51:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:19,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183892007] [2023-07-03 22:51:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:19,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:19,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:19,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:19,867 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:19,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183892007] [2023-07-03 22:51:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183892007] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:19,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268180495] [2023-07-03 22:51:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:19,869 INFO L87 Difference]: Start difference. First operand 414 states and 940 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:20,132 INFO L93 Difference]: Finished difference Result 524 states and 1204 transitions. [2023-07-03 22:51:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:20,145 INFO L225 Difference]: With dead ends: 524 [2023-07-03 22:51:20,145 INFO L226 Difference]: Without dead ends: 524 [2023-07-03 22:51:20,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:20,146 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 35 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:20,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 321 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-07-03 22:51:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 414. [2023-07-03 22:51:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 298 states have (on average 2.3959731543624163) internal successors, (714), 298 states have internal predecessors, (714), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-07-03 22:51:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 940 transitions. [2023-07-03 22:51:20,171 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 940 transitions. Word has length 27 [2023-07-03 22:51:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:20,172 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 940 transitions. [2023-07-03 22:51:20,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 940 transitions. [2023-07-03 22:51:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:20,195 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:20,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:20,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:51:20,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:20,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash -192207030, now seen corresponding path program 1 times [2023-07-03 22:51:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654564206] [2023-07-03 22:51:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:20,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:20,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:20,225 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654564206] [2023-07-03 22:51:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [654564206] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:20,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:20,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268534055] [2023-07-03 22:51:20,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:20,226 INFO L87 Difference]: Start difference. First operand 414 states and 940 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:20,470 INFO L93 Difference]: Finished difference Result 610 states and 1434 transitions. [2023-07-03 22:51:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:20,489 INFO L225 Difference]: With dead ends: 610 [2023-07-03 22:51:20,489 INFO L226 Difference]: Without dead ends: 610 [2023-07-03 22:51:20,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:20,490 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 39 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:20,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 299 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-07-03 22:51:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 500. [2023-07-03 22:51:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 352 states have (on average 2.5) internal successors, (880), 352 states have internal predecessors, (880), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-07-03 22:51:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1170 transitions. [2023-07-03 22:51:20,525 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1170 transitions. Word has length 27 [2023-07-03 22:51:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:20,525 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1170 transitions. [2023-07-03 22:51:20,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1170 transitions. [2023-07-03 22:51:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:20,554 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:20,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:20,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:51:20,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:20,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2050012291, now seen corresponding path program 1 times [2023-07-03 22:51:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042911028] [2023-07-03 22:51:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:20,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:20,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:20,597 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042911028] [2023-07-03 22:51:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042911028] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:20,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:20,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:20,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305166926] [2023-07-03 22:51:20,598 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:20,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:20,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:20,599 INFO L87 Difference]: Start difference. First operand 500 states and 1170 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:21,733 INFO L93 Difference]: Finished difference Result 965 states and 2547 transitions. [2023-07-03 22:51:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:51:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:51:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:21,878 INFO L225 Difference]: With dead ends: 965 [2023-07-03 22:51:21,879 INFO L226 Difference]: Without dead ends: 964 [2023-07-03 22:51:21,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:51:21,880 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 257 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:21,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 315 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-07-03 22:51:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-07-03 22:51:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 865. [2023-07-03 22:51:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 580 states have (on average 2.6189655172413793) internal successors, (1519), 597 states have internal predecessors, (1519), 281 states have call successors, (281), 2 states have call predecessors, (281), 3 states have return successors, (509), 265 states have call predecessors, (509), 281 states have call successors, (509) [2023-07-03 22:51:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2309 transitions. [2023-07-03 22:51:22,047 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2309 transitions. Word has length 27 [2023-07-03 22:51:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:22,047 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 2309 transitions. [2023-07-03 22:51:22,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2309 transitions. [2023-07-03 22:51:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:22,088 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:22,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:22,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:51:22,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:22,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash 895282247, now seen corresponding path program 1 times [2023-07-03 22:51:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041409391] [2023-07-03 22:51:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:22,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:22,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:22,127 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:22,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041409391] [2023-07-03 22:51:22,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041409391] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:22,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:22,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134535334] [2023-07-03 22:51:22,128 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:22,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:22,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:22,129 INFO L87 Difference]: Start difference. First operand 865 states and 2309 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:23,563 INFO L93 Difference]: Finished difference Result 2211 states and 6793 transitions. [2023-07-03 22:51:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:51:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:51:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:24,121 INFO L225 Difference]: With dead ends: 2211 [2023-07-03 22:51:24,121 INFO L226 Difference]: Without dead ends: 2211 [2023-07-03 22:51:24,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:51:24,122 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 178 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:24,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 355 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-07-03 22:51:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2023-07-03 22:51:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1779. [2023-07-03 22:51:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 913 states have (on average 2.6900328587075575) internal successors, (2456), 1214 states have internal predecessors, (2456), 860 states have call successors, (860), 2 states have call predecessors, (860), 5 states have return successors, (2473), 562 states have call predecessors, (2473), 860 states have call successors, (2473) [2023-07-03 22:51:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5789 transitions. [2023-07-03 22:51:25,043 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5789 transitions. Word has length 27 [2023-07-03 22:51:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:25,043 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 5789 transitions. [2023-07-03 22:51:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5789 transitions. [2023-07-03 22:51:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:25,210 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:25,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:25,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:51:25,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:25,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash -687889656, now seen corresponding path program 1 times [2023-07-03 22:51:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:25,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342914813] [2023-07-03 22:51:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:25,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:25,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:25,255 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:25,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342914813] [2023-07-03 22:51:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [342914813] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:25,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:25,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633332008] [2023-07-03 22:51:25,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:25,257 INFO L87 Difference]: Start difference. First operand 1779 states and 5789 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:27,622 INFO L93 Difference]: Finished difference Result 2810 states and 12985 transitions. [2023-07-03 22:51:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:51:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-07-03 22:51:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:28,560 INFO L225 Difference]: With dead ends: 2810 [2023-07-03 22:51:28,560 INFO L226 Difference]: Without dead ends: 2810 [2023-07-03 22:51:28,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:51:28,561 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 257 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:28,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 268 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-07-03 22:51:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2023-07-03 22:51:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1788. [2023-07-03 22:51:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 916 states have (on average 2.6921397379912664) internal successors, (2466), 1223 states have internal predecessors, (2466), 866 states have call successors, (866), 2 states have call predecessors, (866), 5 states have return successors, (2497), 562 states have call predecessors, (2497), 866 states have call successors, (2497) [2023-07-03 22:51:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 5829 transitions. [2023-07-03 22:51:30,060 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 5829 transitions. Word has length 30 [2023-07-03 22:51:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 5829 transitions. [2023-07-03 22:51:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 5829 transitions. [2023-07-03 22:51:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:30,204 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:30,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:51:30,205 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:30,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash 200986430, now seen corresponding path program 1 times [2023-07-03 22:51:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:30,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586042169] [2023-07-03 22:51:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:30,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:30,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:30,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:30,237 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586042169] [2023-07-03 22:51:30,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [586042169] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:30,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:30,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308299939] [2023-07-03 22:51:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:30,239 INFO L87 Difference]: Start difference. First operand 1788 states and 5829 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:31,230 INFO L93 Difference]: Finished difference Result 2534 states and 8670 transitions. [2023-07-03 22:51:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:51:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:31,914 INFO L225 Difference]: With dead ends: 2534 [2023-07-03 22:51:31,914 INFO L226 Difference]: Without dead ends: 2534 [2023-07-03 22:51:31,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:31,915 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 24 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:31,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2023-07-03 22:51:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1870. [2023-07-03 22:51:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 998 states have (on average 2.9929859719438876) internal successors, (2987), 1305 states have internal predecessors, (2987), 866 states have call successors, (866), 2 states have call predecessors, (866), 5 states have return successors, (2497), 562 states have call predecessors, (2497), 866 states have call successors, (2497) [2023-07-03 22:51:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6350 transitions. [2023-07-03 22:51:32,857 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6350 transitions. Word has length 30 [2023-07-03 22:51:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:32,857 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 6350 transitions. [2023-07-03 22:51:32,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6350 transitions. [2023-07-03 22:51:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:33,153 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:33,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:51:33,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:33,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 939612606, now seen corresponding path program 1 times [2023-07-03 22:51:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607034863] [2023-07-03 22:51:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:33,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:33,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:33,195 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607034863] [2023-07-03 22:51:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607034863] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:33,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312819730] [2023-07-03 22:51:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:33,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:33,197 INFO L87 Difference]: Start difference. First operand 1870 states and 6350 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:34,114 INFO L93 Difference]: Finished difference Result 2616 states and 9215 transitions. [2023-07-03 22:51:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:51:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:34,904 INFO L225 Difference]: With dead ends: 2616 [2023-07-03 22:51:34,905 INFO L226 Difference]: Without dead ends: 2616 [2023-07-03 22:51:34,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:34,905 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 29 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:34,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 305 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2023-07-03 22:51:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1922. [2023-07-03 22:51:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1050 states have (on average 3.2923809523809524) internal successors, (3457), 1357 states have internal predecessors, (3457), 866 states have call successors, (866), 2 states have call predecessors, (866), 5 states have return successors, (2497), 562 states have call predecessors, (2497), 866 states have call successors, (2497) [2023-07-03 22:51:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6820 transitions. [2023-07-03 22:51:35,986 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6820 transitions. Word has length 30 [2023-07-03 22:51:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:35,987 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 6820 transitions. [2023-07-03 22:51:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6820 transitions. [2023-07-03 22:51:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:36,155 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:36,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:51:36,155 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:36,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1051541436, now seen corresponding path program 1 times [2023-07-03 22:51:36,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:36,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594736607] [2023-07-03 22:51:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:36,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:36,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:36,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:36,188 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594736607] [2023-07-03 22:51:36,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594736607] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:36,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:36,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138372625] [2023-07-03 22:51:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:36,191 INFO L87 Difference]: Start difference. First operand 1922 states and 6820 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:37,087 INFO L93 Difference]: Finished difference Result 2668 states and 9714 transitions. [2023-07-03 22:51:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:51:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:38,005 INFO L225 Difference]: With dead ends: 2668 [2023-07-03 22:51:38,005 INFO L226 Difference]: Without dead ends: 2668 [2023-07-03 22:51:38,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:38,006 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 34 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:38,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 285 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2023-07-03 22:51:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1922. [2023-07-03 22:51:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1050 states have (on average 3.2923809523809524) internal successors, (3457), 1357 states have internal predecessors, (3457), 866 states have call successors, (866), 2 states have call predecessors, (866), 5 states have return successors, (2497), 562 states have call predecessors, (2497), 866 states have call successors, (2497) [2023-07-03 22:51:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6820 transitions. [2023-07-03 22:51:39,083 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6820 transitions. Word has length 30 [2023-07-03 22:51:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 6820 transitions. [2023-07-03 22:51:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6820 transitions. [2023-07-03 22:51:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:39,255 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:39,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-07-03 22:51:39,256 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:39,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1167853721, now seen corresponding path program 1 times [2023-07-03 22:51:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880015530] [2023-07-03 22:51:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:39,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:39,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:39,299 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880015530] [2023-07-03 22:51:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880015530] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:39,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:39,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224475447] [2023-07-03 22:51:39,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:39,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:39,301 INFO L87 Difference]: Start difference. First operand 1922 states and 6820 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:41,264 INFO L93 Difference]: Finished difference Result 3216 states and 14082 transitions. [2023-07-03 22:51:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:51:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-07-03 22:51:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:42,408 INFO L225 Difference]: With dead ends: 3216 [2023-07-03 22:51:42,408 INFO L226 Difference]: Without dead ends: 3216 [2023-07-03 22:51:42,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:51:42,409 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 175 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 356 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-07-03 22:51:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2023-07-03 22:51:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 1922. [2023-07-03 22:51:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1050 states have (on average 3.2923809523809524) internal successors, (3457), 1357 states have internal predecessors, (3457), 866 states have call successors, (866), 2 states have call predecessors, (866), 5 states have return successors, (2497), 562 states have call predecessors, (2497), 866 states have call successors, (2497) [2023-07-03 22:51:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6820 transitions. [2023-07-03 22:51:43,584 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6820 transitions. Word has length 30 [2023-07-03 22:51:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:43,584 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 6820 transitions. [2023-07-03 22:51:43,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6820 transitions. [2023-07-03 22:51:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:51:44,129 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:44,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:44,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-07-03 22:51:44,129 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:44,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash 420834478, now seen corresponding path program 1 times [2023-07-03 22:51:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405985135] [2023-07-03 22:51:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:44,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-07-03 22:51:44,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:44,176 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:44,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405985135] [2023-07-03 22:51:44,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405985135] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:44,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:44,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-07-03 22:51:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416996899] [2023-07-03 22:51:44,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-07-03 22:51:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-07-03 22:51:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:44,178 INFO L87 Difference]: Start difference. First operand 1922 states and 6820 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:45,260 INFO L93 Difference]: Finished difference Result 2676 states and 9585 transitions. [2023-07-03 22:51:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-07-03 22:51:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-07-03 22:51:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:45,933 INFO L225 Difference]: With dead ends: 2676 [2023-07-03 22:51:45,933 INFO L226 Difference]: Without dead ends: 2676 [2023-07-03 22:51:45,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-07-03 22:51:45,934 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 57 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:45,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 549 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2023-07-03 22:51:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2006. [2023-07-03 22:51:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1090 states have (on average 3.208256880733945) internal successors, (3497), 1377 states have internal predecessors, (3497), 910 states have call successors, (910), 2 states have call predecessors, (910), 5 states have return successors, (2633), 626 states have call predecessors, (2633), 910 states have call successors, (2633) [2023-07-03 22:51:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7040 transitions. [2023-07-03 22:51:46,916 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7040 transitions. Word has length 33 [2023-07-03 22:51:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:46,916 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 7040 transitions. [2023-07-03 22:51:46,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7040 transitions. [2023-07-03 22:51:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:51:47,550 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:47,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:47,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-07-03 22:51:47,551 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:47,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash -85702608, now seen corresponding path program 1 times [2023-07-03 22:51:47,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:47,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617794991] [2023-07-03 22:51:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:47,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:47,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:47,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:51:47,601 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617794991] [2023-07-03 22:51:47,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [617794991] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:47,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:47,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056255016] [2023-07-03 22:51:47,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:47,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:47,603 INFO L87 Difference]: Start difference. First operand 2006 states and 7040 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:50,344 INFO L93 Difference]: Finished difference Result 3578 states and 13722 transitions. [2023-07-03 22:51:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-07-03 22:51:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-07-03 22:51:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:51,536 INFO L225 Difference]: With dead ends: 3578 [2023-07-03 22:51:51,536 INFO L226 Difference]: Without dead ends: 3578 [2023-07-03 22:51:51,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-07-03 22:51:51,537 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 169 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:51,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 429 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-07-03 22:51:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3578 states. [2023-07-03 22:51:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3578 to 2925. [2023-07-03 22:51:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2925 states, 1502 states have (on average 3.2496671105193076) internal successors, (4881), 1903 states have internal predecessors, (4881), 1415 states have call successors, (1415), 2 states have call predecessors, (1415), 7 states have return successors, (5957), 1019 states have call predecessors, (5957), 1415 states have call successors, (5957) [2023-07-03 22:51:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 12253 transitions. [2023-07-03 22:51:53,494 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 12253 transitions. Word has length 33 [2023-07-03 22:51:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:53,495 INFO L495 AbstractCegarLoop]: Abstraction has 2925 states and 12253 transitions. [2023-07-03 22:51:53,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 12253 transitions. [2023-07-03 22:51:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-07-03 22:51:54,559 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:54,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:54,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-07-03 22:51:54,560 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:54,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1850548243, now seen corresponding path program 1 times [2023-07-03 22:51:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:54,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005548363] [2023-07-03 22:51:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:54,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:54,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:51:54,615 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005548363] [2023-07-03 22:51:54,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005548363] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:54,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:54,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761130369] [2023-07-03 22:51:54,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:54,617 INFO L87 Difference]: Start difference. First operand 2925 states and 12253 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:57,931 INFO L93 Difference]: Finished difference Result 3546 states and 15296 transitions. [2023-07-03 22:51:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-07-03 22:51:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-07-03 22:51:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:59,407 INFO L225 Difference]: With dead ends: 3546 [2023-07-03 22:51:59,407 INFO L226 Difference]: Without dead ends: 3546 [2023-07-03 22:51:59,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-07-03 22:51:59,408 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 164 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:59,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 426 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-07-03 22:51:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2023-07-03 22:52:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2102. [2023-07-03 22:52:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1090 states have (on average 3.208256880733945) internal successors, (3497), 1377 states have internal predecessors, (3497), 1006 states have call successors, (1006), 2 states have call predecessors, (1006), 5 states have return successors, (2825), 722 states have call predecessors, (2825), 1006 states have call successors, (2825) [2023-07-03 22:52:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 7328 transitions. [2023-07-03 22:52:00,605 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 7328 transitions. Word has length 36 [2023-07-03 22:52:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:00,605 INFO L495 AbstractCegarLoop]: Abstraction has 2102 states and 7328 transitions. [2023-07-03 22:52:00,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:52:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 7328 transitions. [2023-07-03 22:52:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-07-03 22:52:01,613 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:01,614 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:01,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-07-03 22:52:01,614 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:01,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2069055503, now seen corresponding path program 1 times [2023-07-03 22:52:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:01,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582679458] [2023-07-03 22:52:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:01,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 7 conjunts are in the unsatisfiable core [2023-07-03 22:52:01,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-07-03 22:52:01,695 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582679458] [2023-07-03 22:52:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582679458] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:01,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:01,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-07-03 22:52:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066775856] [2023-07-03 22:52:01,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-07-03 22:52:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-07-03 22:52:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-07-03 22:52:01,697 INFO L87 Difference]: Start difference. First operand 2102 states and 7328 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-07-03 22:52:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:11,771 INFO L93 Difference]: Finished difference Result 6916 states and 35542 transitions. [2023-07-03 22:52:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-07-03 22:52:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2023-07-03 22:52:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:17,510 INFO L225 Difference]: With dead ends: 6916 [2023-07-03 22:52:17,510 INFO L226 Difference]: Without dead ends: 6916 [2023-07-03 22:52:17,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2023-07-03 22:52:17,511 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 514 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 3475 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 3475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:17,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 685 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 3475 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-07-03 22:52:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2023-07-03 22:52:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 2943. [2023-07-03 22:52:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 1502 states have (on average 3.2496671105193076) internal successors, (4881), 1903 states have internal predecessors, (4881), 1433 states have call successors, (1433), 2 states have call predecessors, (1433), 7 states have return successors, (5793), 1037 states have call predecessors, (5793), 1433 states have call successors, (5793) [2023-07-03 22:52:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 12107 transitions. [2023-07-03 22:52:21,384 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 12107 transitions. Word has length 56 [2023-07-03 22:52:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:21,384 INFO L495 AbstractCegarLoop]: Abstraction has 2943 states and 12107 transitions. [2023-07-03 22:52:21,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-07-03 22:52:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 12107 transitions. [2023-07-03 22:52:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-07-03 22:52:23,413 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:23,413 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:23,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-07-03 22:52:23,414 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:23,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash 93584685, now seen corresponding path program 1 times [2023-07-03 22:52:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268352174] [2023-07-03 22:52:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:23,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:52:23,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-07-03 22:52:23,483 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268352174] [2023-07-03 22:52:23,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [268352174] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:23,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:23,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-07-03 22:52:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124739039] [2023-07-03 22:52:23,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:23,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-07-03 22:52:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-07-03 22:52:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:52:23,485 INFO L87 Difference]: Start difference. First operand 2943 states and 12107 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-07-03 22:52:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:32,650 INFO L93 Difference]: Finished difference Result 7040 states and 37344 transitions. [2023-07-03 22:52:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-07-03 22:52:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2023-07-03 22:52:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:40,839 INFO L225 Difference]: With dead ends: 7040 [2023-07-03 22:52:40,840 INFO L226 Difference]: Without dead ends: 7040 [2023-07-03 22:52:40,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-07-03 22:52:40,840 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 252 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:40,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 507 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-07-03 22:52:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2023-07-03 22:52:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 4851. [2023-07-03 22:52:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 2414 states have (on average 3.347555923777962) internal successors, (8081), 3091 states have internal predecessors, (8081), 2425 states have call successors, (2425), 2 states have call predecessors, (2425), 11 states have return successors, (16653), 1757 states have call predecessors, (16653), 2425 states have call successors, (16653) [2023-07-03 22:52:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 27159 transitions. [2023-07-03 22:52:47,571 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 27159 transitions. Word has length 56 [2023-07-03 22:52:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:47,571 INFO L495 AbstractCegarLoop]: Abstraction has 4851 states and 27159 transitions. [2023-07-03 22:52:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-07-03 22:52:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 27159 transitions. [2023-07-03 22:52:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-07-03 22:52:49,926 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:49,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-07-03 22:52:49,926 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:49,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 340080381, now seen corresponding path program 1 times [2023-07-03 22:52:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158004279] [2023-07-03 22:52:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:49,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2023-07-03 22:52:49,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-07-03 22:52:49,970 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158004279] [2023-07-03 22:52:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [158004279] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:49,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140911180] [2023-07-03 22:52:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:49,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:49,971 INFO L87 Difference]: Start difference. First operand 4851 states and 27159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:52:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:54,172 INFO L93 Difference]: Finished difference Result 5066 states and 28614 transitions. [2023-07-03 22:52:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-07-03 22:52:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:57,926 INFO L225 Difference]: With dead ends: 5066 [2023-07-03 22:52:57,926 INFO L226 Difference]: Without dead ends: 5066 [2023-07-03 22:52:57,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:52:57,927 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:57,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 242 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2023-07-03 22:53:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4823. [2023-07-03 22:53:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4823 states, 2410 states have (on average 3.3182572614107886) internal successors, (7997), 3075 states have internal predecessors, (7997), 2401 states have call successors, (2401), 2 states have call predecessors, (2401), 11 states have return successors, (16413), 1745 states have call predecessors, (16413), 2401 states have call successors, (16413) [2023-07-03 22:53:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 26811 transitions. [2023-07-03 22:53:03,488 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 26811 transitions. Word has length 39 [2023-07-03 22:53:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:53:03,488 INFO L495 AbstractCegarLoop]: Abstraction has 4823 states and 26811 transitions. [2023-07-03 22:53:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:53:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 26811 transitions. [2023-07-03 22:53:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-07-03 22:53:05,965 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:53:05,965 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:53:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-07-03 22:53:05,966 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:53:05,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:53:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1200017625, now seen corresponding path program 1 times [2023-07-03 22:53:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:53:05,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147616198] [2023-07-03 22:53:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:53:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:53:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:53:05,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2023-07-03 22:53:05,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:53:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-07-03 22:53:06,363 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:53:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147616198] [2023-07-03 22:53:06,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [147616198] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:53:06,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:53:06,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:53:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904719816] [2023-07-03 22:53:06,364 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:53:06,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:53:06,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:53:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:53:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:53:06,365 INFO L87 Difference]: Start difference. First operand 4823 states and 26811 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:54:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:54:29,163 INFO L93 Difference]: Finished difference Result 16533 states and 162402 transitions. [2023-07-03 22:54:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:54:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-07-03 22:54:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted.