/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/add-sub-k/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/add-sub-k/add-sub-k.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-3a8dd60-m [2023-06-12 17:59:02,066 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-06-12 17:59:02,110 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/ThreadModularVerifier.Settings.epf [2023-06-12 17:59:02,116 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-06-12 17:59:02,118 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-06-12 17:59:02,118 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-06-12 17:59:02,118 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-06-12 17:59:02,119 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-06-12 17:59:02,119 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-06-12 17:59:02,120 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-06-12 17:59:02,120 INFO L137 SettingsManager]: * Save file in source directory=true [2023-06-12 17:59:02,121 INFO L137 SettingsManager]: * Use automatic naming=true [2023-06-12 17:59:02,121 INFO L137 SettingsManager]: * File name=CHC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-06-12 17:59:02,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-06-12 17:59:02,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-06-12 17:59:02,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-06-12 17:59:02,366 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-06-12 17:59:02,367 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-06-12 17:59:02,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/add-sub-k.bpl [2023-06-12 17:59:02,371 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/add-sub-k.bpl' [2023-06-12 17:59:02,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-06-12 17:59:02,389 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-06-12 17:59:02,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:02,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:02,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:02,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:02,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:02,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:02,445 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) [2023-06-12 17:59:02,471 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 [2023-06-12 17:59:02,488 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-06-12 17:59:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-06-12 17:59:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-06-12 17:59:02,531 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:02,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:02,535 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-06-12 17:59:02,576 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:02,582 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-06-12 17:59:02,582 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:02,583 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02 BoogieIcfgContainer [2023-06-12 17:59:02,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:02,584 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-06-12 17:59:02,584 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-06-12 17:59:02,585 INFO L274 PluginConnector]: IcfgToChc initialized [2023-06-12 17:59:02,586 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,808 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,820 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,822 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,859 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'havoc k;' is: true [2023-06-12 17:59:02,865 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'havoc k;' is: true [2023-06-12 17:59:02,866 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'havoc k;' is: true [2023-06-12 17:59:02,888 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,896 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,901 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,924 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,929 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,931 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,939 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,942 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,948 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:03,017 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:03 HornClauseAST [2023-06-12 17:59:03,017 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-06-12 17:59:03,018 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-06-12 17:59:03,018 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-06-12 17:59:03,018 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-06-12 17:59:03,019 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,020 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/CHC_add-sub-k.bpl_UID9995858420172402052.smt2 [2023-06-12 17:59:03,046 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-06-12 17:59:03,047 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-06-12 17:59:03,047 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-06-12 17:59:03,047 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-06-12 17:59:03,048 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,073 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03 Unit [2023-06-12 17:59:03,073 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-06-12 17:59:03,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:03,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:03,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:03,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:03,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:03,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:03,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:03,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (1/1) ... [2023-06-12 17:59:03,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:03,098 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) [2023-06-12 17:59:03,105 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 [2023-06-12 17:59:03,107 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-06-12 17:59:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-06-12 17:59:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-06-12 17:59:03,107 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-06-12 17:59:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-06-12 17:59:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-06-12 17:59:03,128 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:03,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:03,447 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:03,452 INFO L294 CfgBuilder]: Using library mode [2023-06-12 17:59:03,452 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:03,453 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:03 BoogieIcfgContainer [2023-06-12 17:59:03,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:03,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-06-12 17:59:03,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-06-12 17:59:03,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-06-12 17:59:03,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:02" (1/5) ... [2023-06-12 17:59:03,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9e577d and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:03, skipping insertion in model container [2023-06-12 17:59:03,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02" (2/5) ... [2023-06-12 17:59:03,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9e577d and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 05:59:03, skipping insertion in model container [2023-06-12 17:59:03,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:03" (3/5) ... [2023-06-12 17:59:03,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9e577d and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 12.06 05:59:03, skipping insertion in model container [2023-06-12 17:59:03,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:03" (4/5) ... [2023-06-12 17:59:03,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9e577d and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:03, skipping insertion in model container [2023-06-12 17:59:03,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:03" (5/5) ... [2023-06-12 17:59:03,469 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-06-12 17:59:03,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-06-12 17:59:03,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-06-12 17:59:03,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-06-12 17:59:03,519 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;@45d5959c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-06-12 17:59:03,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-06-12 17:59:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 63 states have internal predecessors, (90), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-06-12 17:59:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-06-12 17:59:03,534 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:03,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:03,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:03,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1176173027, now seen corresponding path program 1 times [2023-06-12 17:59:03,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:03,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461988551] [2023-06-12 17:59:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:03,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:03,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:03,720 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461988551] [2023-06-12 17:59:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461988551] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:03,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234904774] [2023-06-12 17:59:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:03,758 INFO L87 Difference]: Start difference. First operand has 96 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 63 states have internal predecessors, (90), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) 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) [2023-06-12 17:59:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,177 INFO L93 Difference]: Finished difference Result 186 states and 298 transitions. [2023-06-12 17:59:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,179 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 [2023-06-12 17:59:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,200 INFO L225 Difference]: With dead ends: 186 [2023-06-12 17:59:04,200 INFO L226 Difference]: Without dead ends: 184 [2023-06-12 17:59:04,201 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 [2023-06-12 17:59:04,205 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 246 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 214 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-06-12 17:59:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-06-12 17:59:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 120 states have (on average 1.45) internal successors, (174), 120 states have internal predecessors, (174), 61 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-06-12 17:59:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 296 transitions. [2023-06-12 17:59:04,300 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 296 transitions. Word has length 8 [2023-06-12 17:59:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,303 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 296 transitions. [2023-06-12 17:59:04,304 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) [2023-06-12 17:59:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 296 transitions. [2023-06-12 17:59:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:04,314 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-06-12 17:59:04,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 342395553, now seen corresponding path program 1 times [2023-06-12 17:59:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958634146] [2023-06-12 17:59:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:04,356 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958634146] [2023-06-12 17:59:04,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958634146] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609467460] [2023-06-12 17:59:04,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,360 INFO L87 Difference]: Start difference. First operand 184 states and 296 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) [2023-06-12 17:59:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,647 INFO L93 Difference]: Finished difference Result 316 states and 528 transitions. [2023-06-12 17:59:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,648 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 [2023-06-12 17:59:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,654 INFO L225 Difference]: With dead ends: 316 [2023-06-12 17:59:04,655 INFO L226 Difference]: Without dead ends: 316 [2023-06-12 17:59:04,655 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 [2023-06-12 17:59:04,656 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 36 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 474 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-06-12 17:59:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 286. [2023-06-12 17:59:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 182 states have (on average 1.5164835164835164) internal successors, (276), 182 states have internal predecessors, (276), 101 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-06-12 17:59:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 478 transitions. [2023-06-12 17:59:04,691 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 478 transitions. Word has length 10 [2023-06-12 17:59:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,691 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 478 transitions. [2023-06-12 17:59:04,691 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) [2023-06-12 17:59:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 478 transitions. [2023-06-12 17:59:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:04,695 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-06-12 17:59:04,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash -284346331, now seen corresponding path program 1 times [2023-06-12 17:59:04,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064114021] [2023-06-12 17:59:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:04,732 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064114021] [2023-06-12 17:59:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064114021] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986616431] [2023-06-12 17:59:04,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,734 INFO L87 Difference]: Start difference. First operand 286 states and 478 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) [2023-06-12 17:59:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,999 INFO L93 Difference]: Finished difference Result 398 states and 690 transitions. [2023-06-12 17:59:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,000 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 [2023-06-12 17:59:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,010 INFO L225 Difference]: With dead ends: 398 [2023-06-12 17:59:05,010 INFO L226 Difference]: Without dead ends: 398 [2023-06-12 17:59:05,010 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 [2023-06-12 17:59:05,011 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 26 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 449 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-06-12 17:59:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 308. [2023-06-12 17:59:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 204 states have (on average 1.6568627450980393) internal successors, (338), 204 states have internal predecessors, (338), 101 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-06-12 17:59:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 540 transitions. [2023-06-12 17:59:05,042 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 540 transitions. Word has length 10 [2023-06-12 17:59:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,042 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 540 transitions. [2023-06-12 17:59:05,043 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) [2023-06-12 17:59:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 540 transitions. [2023-06-12 17:59:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:05,049 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-06-12 17:59:05,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1550162799, now seen corresponding path program 1 times [2023-06-12 17:59:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460696848] [2023-06-12 17:59:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:05,079 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460696848] [2023-06-12 17:59:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [460696848] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395008081] [2023-06-12 17:59:05,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,081 INFO L87 Difference]: Start difference. First operand 308 states and 540 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) [2023-06-12 17:59:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,337 INFO L93 Difference]: Finished difference Result 442 states and 810 transitions. [2023-06-12 17:59:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,338 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 [2023-06-12 17:59:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,352 INFO L225 Difference]: With dead ends: 442 [2023-06-12 17:59:05,352 INFO L226 Difference]: Without dead ends: 442 [2023-06-12 17:59:05,352 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 [2023-06-12 17:59:05,356 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 38 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 472 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-06-12 17:59:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 412. [2023-06-12 17:59:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 268 states have (on average 1.7835820895522387) internal successors, (478), 268 states have internal predecessors, (478), 141 states have call successors, (141), 2 states have call predecessors, (141), 2 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2023-06-12 17:59:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 760 transitions. [2023-06-12 17:59:05,397 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 760 transitions. Word has length 13 [2023-06-12 17:59:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,397 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 760 transitions. [2023-06-12 17:59:05,397 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) [2023-06-12 17:59:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 760 transitions. [2023-06-12 17:59:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:05,408 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-06-12 17:59:05,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2069077533, now seen corresponding path program 1 times [2023-06-12 17:59:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90511218] [2023-06-12 17:59:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:05,438 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90511218] [2023-06-12 17:59:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [90511218] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606228675] [2023-06-12 17:59:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,440 INFO L87 Difference]: Start difference. First operand 412 states and 760 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) [2023-06-12 17:59:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,697 INFO L93 Difference]: Finished difference Result 648 states and 1248 transitions. [2023-06-12 17:59:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,698 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 [2023-06-12 17:59:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,722 INFO L225 Difference]: With dead ends: 648 [2023-06-12 17:59:05,722 INFO L226 Difference]: Without dead ends: 648 [2023-06-12 17:59:05,722 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 [2023-06-12 17:59:05,723 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 28 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 447 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-06-12 17:59:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 438. [2023-06-12 17:59:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 294 states have (on average 2.0952380952380953) internal successors, (616), 294 states have internal predecessors, (616), 141 states have call successors, (141), 2 states have call predecessors, (141), 2 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2023-06-12 17:59:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 898 transitions. [2023-06-12 17:59:05,776 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 898 transitions. Word has length 13 [2023-06-12 17:59:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,776 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 898 transitions. [2023-06-12 17:59:05,776 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) [2023-06-12 17:59:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 898 transitions. [2023-06-12 17:59:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:05,798 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-06-12 17:59:05,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash -305590995, now seen corresponding path program 1 times [2023-06-12 17:59:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867333137] [2023-06-12 17:59:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:05,858 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867333137] [2023-06-12 17:59:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867333137] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779099575] [2023-06-12 17:59:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,859 INFO L87 Difference]: Start difference. First operand 438 states and 898 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) [2023-06-12 17:59:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,087 INFO L93 Difference]: Finished difference Result 574 states and 1212 transitions. [2023-06-12 17:59:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,088 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 [2023-06-12 17:59:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,111 INFO L225 Difference]: With dead ends: 574 [2023-06-12 17:59:06,112 INFO L226 Difference]: Without dead ends: 574 [2023-06-12 17:59:06,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,113 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 40 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:06,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 470 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-06-12 17:59:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 544. [2023-06-12 17:59:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 360 states have (on average 2.2222222222222223) internal successors, (800), 360 states have internal predecessors, (800), 181 states have call successors, (181), 2 states have call predecessors, (181), 2 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2023-06-12 17:59:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1162 transitions. [2023-06-12 17:59:06,159 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1162 transitions. Word has length 16 [2023-06-12 17:59:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:06,159 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 1162 transitions. [2023-06-12 17:59:06,159 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) [2023-06-12 17:59:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1162 transitions. [2023-06-12 17:59:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:06,189 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:06,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-06-12 17:59:06,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:06,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1919382999, now seen corresponding path program 1 times [2023-06-12 17:59:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008778197] [2023-06-12 17:59:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:06,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:06,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:06,220 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008778197] [2023-06-12 17:59:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008778197] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:06,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:06,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:06,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362427554] [2023-06-12 17:59:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:06,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:06,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:06,222 INFO L87 Difference]: Start difference. First operand 544 states and 1162 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) [2023-06-12 17:59:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,505 INFO L93 Difference]: Finished difference Result 842 states and 1798 transitions. [2023-06-12 17:59:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,505 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 [2023-06-12 17:59:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,559 INFO L225 Difference]: With dead ends: 842 [2023-06-12 17:59:06,559 INFO L226 Difference]: Without dead ends: 842 [2023-06-12 17:59:06,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,560 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 30 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:06,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 445 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-06-12 17:59:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 572. [2023-06-12 17:59:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 388 states have (on average 2.5412371134020617) internal successors, (986), 388 states have internal predecessors, (986), 181 states have call successors, (181), 2 states have call predecessors, (181), 2 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2023-06-12 17:59:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1348 transitions. [2023-06-12 17:59:06,625 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1348 transitions. Word has length 16 [2023-06-12 17:59:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:06,626 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 1348 transitions. [2023-06-12 17:59:06,626 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) [2023-06-12 17:59:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1348 transitions. [2023-06-12 17:59:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:06,679 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:06,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:06,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-06-12 17:59:06,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:06,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:06,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1506290913, now seen corresponding path program 1 times [2023-06-12 17:59:06,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:06,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956866925] [2023-06-12 17:59:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:06,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:06,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:06,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:06,709 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956866925] [2023-06-12 17:59:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956866925] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:06,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954601526] [2023-06-12 17:59:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:06,710 INFO L87 Difference]: Start difference. First operand 572 states and 1348 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-06-12 17:59:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,941 INFO L93 Difference]: Finished difference Result 710 states and 1712 transitions. [2023-06-12 17:59:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 19 [2023-06-12 17:59:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,965 INFO L225 Difference]: With dead ends: 710 [2023-06-12 17:59:06,965 INFO L226 Difference]: Without dead ends: 710 [2023-06-12 17:59:06,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,966 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 42 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:06,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 468 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-06-12 17:59:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 680. [2023-06-12 17:59:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 456 states have (on average 2.675438596491228) internal successors, (1220), 456 states have internal predecessors, (1220), 221 states have call successors, (221), 2 states have call predecessors, (221), 2 states have return successors, (221), 221 states have call predecessors, (221), 221 states have call successors, (221) [2023-06-12 17:59:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1662 transitions. [2023-06-12 17:59:07,018 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1662 transitions. Word has length 19 [2023-06-12 17:59:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:07,018 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1662 transitions. [2023-06-12 17:59:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-06-12 17:59:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1662 transitions. [2023-06-12 17:59:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:07,098 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:07,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-06-12 17:59:07,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:07,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1522379945, now seen corresponding path program 1 times [2023-06-12 17:59:07,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:07,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870699822] [2023-06-12 17:59:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:07,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:07,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:07,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:07,125 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:07,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870699822] [2023-06-12 17:59:07,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [870699822] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:07,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:07,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183614857] [2023-06-12 17:59:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:07,127 INFO L87 Difference]: Start difference. First operand 680 states and 1662 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-06-12 17:59:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,401 INFO L93 Difference]: Finished difference Result 1040 states and 2452 transitions. [2023-06-12 17:59:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 19 [2023-06-12 17:59:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:07,456 INFO L225 Difference]: With dead ends: 1040 [2023-06-12 17:59:07,456 INFO L226 Difference]: Without dead ends: 1040 [2023-06-12 17:59:07,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:07,457 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 32 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:07,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 443 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2023-06-12 17:59:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 710. [2023-06-12 17:59:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 486 states have (on average 3.0041152263374484) internal successors, (1460), 486 states have internal predecessors, (1460), 221 states have call successors, (221), 2 states have call predecessors, (221), 2 states have return successors, (221), 221 states have call predecessors, (221), 221 states have call successors, (221) [2023-06-12 17:59:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1902 transitions. [2023-06-12 17:59:07,542 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1902 transitions. Word has length 19 [2023-06-12 17:59:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:07,542 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1902 transitions. [2023-06-12 17:59:07,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-06-12 17:59:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1902 transitions. [2023-06-12 17:59:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:07,703 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:07,703 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] [2023-06-12 17:59:07,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-06-12 17:59:07,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:07,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1887328477, now seen corresponding path program 1 times [2023-06-12 17:59:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898613533] [2023-06-12 17:59:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:07,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:07,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:07,734 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898613533] [2023-06-12 17:59:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [898613533] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:07,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204284528] [2023-06-12 17:59:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:07,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:07,736 INFO L87 Difference]: Start difference. First operand 710 states and 1902 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) [2023-06-12 17:59:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,980 INFO L93 Difference]: Finished difference Result 850 states and 2322 transitions. [2023-06-12 17:59:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,981 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 [2023-06-12 17:59:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:08,019 INFO L225 Difference]: With dead ends: 850 [2023-06-12 17:59:08,019 INFO L226 Difference]: Without dead ends: 850 [2023-06-12 17:59:08,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:08,020 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 44 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:08,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 466 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-06-12 17:59:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 820. [2023-06-12 17:59:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 556 states have (on average 3.147482014388489) internal successors, (1750), 556 states have internal predecessors, (1750), 261 states have call successors, (261), 2 states have call predecessors, (261), 2 states have return successors, (261), 261 states have call predecessors, (261), 261 states have call successors, (261) [2023-06-12 17:59:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2272 transitions. [2023-06-12 17:59:08,099 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2272 transitions. Word has length 22 [2023-06-12 17:59:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:08,099 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 2272 transitions. [2023-06-12 17:59:08,099 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) [2023-06-12 17:59:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2272 transitions. [2023-06-12 17:59:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:08,186 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:08,186 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] [2023-06-12 17:59:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-06-12 17:59:08,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:08,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1398621755, now seen corresponding path program 1 times [2023-06-12 17:59:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:08,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096282126] [2023-06-12 17:59:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:08,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:08,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:08,211 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:08,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096282126] [2023-06-12 17:59:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096282126] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:08,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453193309] [2023-06-12 17:59:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:08,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:08,213 INFO L87 Difference]: Start difference. First operand 820 states and 2272 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) [2023-06-12 17:59:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:08,501 INFO L93 Difference]: Finished difference Result 1242 states and 3222 transitions. [2023-06-12 17:59:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:08,502 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 [2023-06-12 17:59:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:08,567 INFO L225 Difference]: With dead ends: 1242 [2023-06-12 17:59:08,568 INFO L226 Difference]: Without dead ends: 1242 [2023-06-12 17:59:08,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:08,568 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 34 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:08,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 441 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2023-06-12 17:59:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 852. [2023-06-12 17:59:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 588 states have (on average 3.4863945578231292) internal successors, (2050), 588 states have internal predecessors, (2050), 261 states have call successors, (261), 2 states have call predecessors, (261), 2 states have return successors, (261), 261 states have call predecessors, (261), 261 states have call successors, (261) [2023-06-12 17:59:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2572 transitions. [2023-06-12 17:59:08,676 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2572 transitions. Word has length 22 [2023-06-12 17:59:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:08,676 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 2572 transitions. [2023-06-12 17:59:08,676 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) [2023-06-12 17:59:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2572 transitions. [2023-06-12 17:59:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:08,791 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:08,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:08,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-06-12 17:59:08,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:08,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -616128429, now seen corresponding path program 1 times [2023-06-12 17:59:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913237888] [2023-06-12 17:59:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:08,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:08,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:08,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:08,833 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913237888] [2023-06-12 17:59:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913237888] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:08,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:08,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393844802] [2023-06-12 17:59:08,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:08,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:08,835 INFO L87 Difference]: Start difference. First operand 852 states and 2572 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) [2023-06-12 17:59:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:10,181 INFO L93 Difference]: Finished difference Result 1395 states and 4495 transitions. [2023-06-12 17:59:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-06-12 17:59:10,182 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 [2023-06-12 17:59:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:10,375 INFO L225 Difference]: With dead ends: 1395 [2023-06-12 17:59:10,375 INFO L226 Difference]: Without dead ends: 1394 [2023-06-12 17:59:10,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-06-12 17:59:10,377 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 299 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:10,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 364 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-06-12 17:59:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-06-12 17:59:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1269. [2023-06-12 17:59:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 859 states have (on average 3.4644935972060535) internal successors, (2976), 875 states have internal predecessors, (2976), 406 states have call successors, (406), 2 states have call predecessors, (406), 3 states have return successors, (781), 391 states have call predecessors, (781), 406 states have call successors, (781) [2023-06-12 17:59:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4163 transitions. [2023-06-12 17:59:10,715 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4163 transitions. Word has length 27 [2023-06-12 17:59:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:10,716 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 4163 transitions. [2023-06-12 17:59:10,716 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) [2023-06-12 17:59:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4163 transitions. [2023-06-12 17:59:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:10,860 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:10,860 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, 1, 1, 1] [2023-06-12 17:59:10,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-06-12 17:59:10,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:10,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2086894901, now seen corresponding path program 1 times [2023-06-12 17:59:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48835594] [2023-06-12 17:59:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:10,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-06-12 17:59:10,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:10,932 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48835594] [2023-06-12 17:59:10,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [48835594] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:10,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:10,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254009206] [2023-06-12 17:59:10,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:10,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:10,934 INFO L87 Difference]: Start difference. First operand 1269 states and 4163 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-06-12 17:59:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:11,626 INFO L93 Difference]: Finished difference Result 2127 states and 6761 transitions. [2023-06-12 17:59:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-06-12 17:59:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 25 [2023-06-12 17:59:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:11,902 INFO L225 Difference]: With dead ends: 2127 [2023-06-12 17:59:11,902 INFO L226 Difference]: Without dead ends: 2127 [2023-06-12 17:59:11,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-06-12 17:59:11,903 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 71 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:11,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 527 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2023-06-12 17:59:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1785. [2023-06-12 17:59:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1213 states have (on average 3.5333882934872216) internal successors, (4286), 1235 states have internal predecessors, (4286), 568 states have call successors, (568), 2 states have call predecessors, (568), 3 states have return successors, (1087), 547 states have call predecessors, (1087), 568 states have call successors, (1087) [2023-06-12 17:59:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 5941 transitions. [2023-06-12 17:59:12,316 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 5941 transitions. Word has length 25 [2023-06-12 17:59:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:12,316 INFO L495 AbstractCegarLoop]: Abstraction has 1785 states and 5941 transitions. [2023-06-12 17:59:12,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-06-12 17:59:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 5941 transitions. [2023-06-12 17:59:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:12,635 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:12,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:12,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-06-12 17:59:12,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:12,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash -408455353, now seen corresponding path program 1 times [2023-06-12 17:59:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216305332] [2023-06-12 17:59:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:12,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:12,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:12,709 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216305332] [2023-06-12 17:59:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216305332] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:12,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:12,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835097820] [2023-06-12 17:59:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:12,711 INFO L87 Difference]: Start difference. First operand 1785 states and 5941 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) [2023-06-12 17:59:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:13,506 INFO L93 Difference]: Finished difference Result 2705 states and 8561 transitions. [2023-06-12 17:59:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:13,507 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 [2023-06-12 17:59:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:14,020 INFO L225 Difference]: With dead ends: 2705 [2023-06-12 17:59:14,020 INFO L226 Difference]: Without dead ends: 2705 [2023-06-12 17:59:14,020 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 [2023-06-12 17:59:14,021 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:14,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 381 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2023-06-12 17:59:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1817. [2023-06-12 17:59:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1817 states, 1245 states have (on average 3.66425702811245) internal successors, (4562), 1267 states have internal predecessors, (4562), 568 states have call successors, (568), 2 states have call predecessors, (568), 3 states have return successors, (1087), 547 states have call predecessors, (1087), 568 states have call successors, (1087) [2023-06-12 17:59:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 6217 transitions. [2023-06-12 17:59:14,584 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 6217 transitions. Word has length 27 [2023-06-12 17:59:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 1817 states and 6217 transitions. [2023-06-12 17:59:14,585 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) [2023-06-12 17:59:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 6217 transitions. [2023-06-12 17:59:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:14,758 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:14,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:14,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-06-12 17:59:14,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:14,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash -938747117, now seen corresponding path program 1 times [2023-06-12 17:59:14,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670551297] [2023-06-12 17:59:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:14,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:14,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:14,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:14,788 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:14,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670551297] [2023-06-12 17:59:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670551297] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:14,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:14,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359657285] [2023-06-12 17:59:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:14,790 INFO L87 Difference]: Start difference. First operand 1817 states and 6217 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) [2023-06-12 17:59:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:15,271 INFO L93 Difference]: Finished difference Result 2113 states and 7243 transitions. [2023-06-12 17:59:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:15,271 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 [2023-06-12 17:59:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:15,469 INFO L225 Difference]: With dead ends: 2113 [2023-06-12 17:59:15,469 INFO L226 Difference]: Without dead ends: 2113 [2023-06-12 17:59:15,469 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 [2023-06-12 17:59:15,470 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 42 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:15,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 402 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2023-06-12 17:59:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1885. [2023-06-12 17:59:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1289 states have (on average 3.7020946470131886) internal successors, (4772), 1311 states have internal predecessors, (4772), 592 states have call successors, (592), 2 states have call predecessors, (592), 3 states have return successors, (1135), 571 states have call predecessors, (1135), 592 states have call successors, (1135) [2023-06-12 17:59:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-06-12 17:59:15,885 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-06-12 17:59:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:15,885 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-06-12 17:59:15,885 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) [2023-06-12 17:59:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-06-12 17:59:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:16,201 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:16,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-06-12 17:59:16,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:16,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1794990457, now seen corresponding path program 1 times [2023-06-12 17:59:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:16,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651172567] [2023-06-12 17:59:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:16,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:16,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:16,230 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:16,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651172567] [2023-06-12 17:59:16,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [651172567] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:16,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:16,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225829772] [2023-06-12 17:59:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:16,231 INFO L87 Difference]: Start difference. First operand 1885 states and 6499 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) [2023-06-12 17:59:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:17,079 INFO L93 Difference]: Finished difference Result 2857 states and 9363 transitions. [2023-06-12 17:59:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:17,079 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 [2023-06-12 17:59:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:17,655 INFO L225 Difference]: With dead ends: 2857 [2023-06-12 17:59:17,655 INFO L226 Difference]: Without dead ends: 2857 [2023-06-12 17:59:17,655 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 [2023-06-12 17:59:17,656 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 39 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:17,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 361 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2023-06-12 17:59:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 1885. [2023-06-12 17:59:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1289 states have (on average 3.7020946470131886) internal successors, (4772), 1311 states have internal predecessors, (4772), 592 states have call successors, (592), 2 states have call predecessors, (592), 3 states have return successors, (1135), 571 states have call predecessors, (1135), 592 states have call successors, (1135) [2023-06-12 17:59:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-06-12 17:59:18,207 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-06-12 17:59:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:18,208 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-06-12 17:59:18,208 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) [2023-06-12 17:59:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-06-12 17:59:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:18,393 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:18,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:18,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-06-12 17:59:18,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:18,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1529844575, now seen corresponding path program 1 times [2023-06-12 17:59:18,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:18,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129409606] [2023-06-12 17:59:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:18,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:18,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:18,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:18,425 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129409606] [2023-06-12 17:59:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [129409606] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:18,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:18,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526463240] [2023-06-12 17:59:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:18,427 INFO L87 Difference]: Start difference. First operand 1885 states and 6499 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) [2023-06-12 17:59:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:18,986 INFO L93 Difference]: Finished difference Result 2278 states and 7855 transitions. [2023-06-12 17:59:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:18,986 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 [2023-06-12 17:59:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:19,308 INFO L225 Difference]: With dead ends: 2278 [2023-06-12 17:59:19,308 INFO L226 Difference]: Without dead ends: 2278 [2023-06-12 17:59:19,308 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 [2023-06-12 17:59:19,312 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 46 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:19,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 380 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2023-06-12 17:59:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1885. [2023-06-12 17:59:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1289 states have (on average 3.7020946470131886) internal successors, (4772), 1311 states have internal predecessors, (4772), 592 states have call successors, (592), 2 states have call predecessors, (592), 3 states have return successors, (1135), 571 states have call predecessors, (1135), 592 states have call successors, (1135) [2023-06-12 17:59:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-06-12 17:59:19,787 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-06-12 17:59:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:19,788 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-06-12 17:59:19,788 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) [2023-06-12 17:59:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-06-12 17:59:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:19,971 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:19,971 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, 1, 1, 1] [2023-06-12 17:59:19,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-06-12 17:59:19,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:19,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 761581309, now seen corresponding path program 1 times [2023-06-12 17:59:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817641142] [2023-06-12 17:59:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:19,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-06-12 17:59:19,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:20,027 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:20,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817641142] [2023-06-12 17:59:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817641142] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:20,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206101248] [2023-06-12 17:59:20,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:20,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:20,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:20,029 INFO L87 Difference]: Start difference. First operand 1885 states and 6499 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-06-12 17:59:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:20,921 INFO L93 Difference]: Finished difference Result 3327 states and 11263 transitions. [2023-06-12 17:59:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-06-12 17:59:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 25 [2023-06-12 17:59:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:21,615 INFO L225 Difference]: With dead ends: 3327 [2023-06-12 17:59:21,616 INFO L226 Difference]: Without dead ends: 3327 [2023-06-12 17:59:21,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-06-12 17:59:21,616 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 65 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:21,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 511 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2023-06-12 17:59:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2749. [2023-06-12 17:59:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 1907 states have (on average 3.903513371788149) internal successors, (7444), 1935 states have internal predecessors, (7444), 838 states have call successors, (838), 2 states have call predecessors, (838), 3 states have return successors, (1609), 811 states have call predecessors, (1609), 838 states have call successors, (1609) [2023-06-12 17:59:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 9891 transitions. [2023-06-12 17:59:22,420 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 9891 transitions. Word has length 25 [2023-06-12 17:59:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:22,421 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 9891 transitions. [2023-06-12 17:59:22,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-06-12 17:59:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 9891 transitions. [2023-06-12 17:59:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 17:59:23,023 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:23,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:23,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-06-12 17:59:23,023 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:23,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash -824980073, now seen corresponding path program 2 times [2023-06-12 17:59:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757389773] [2023-06-12 17:59:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:23,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:23,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:23,047 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:23,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757389773] [2023-06-12 17:59:23,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [757389773] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:23,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:23,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712774962] [2023-06-12 17:59:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:23,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:23,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:23,050 INFO L87 Difference]: Start difference. First operand 2749 states and 9891 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:23,813 INFO L93 Difference]: Finished difference Result 3390 states and 11987 transitions. [2023-06-12 17:59:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 28 [2023-06-12 17:59:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:24,392 INFO L225 Difference]: With dead ends: 3390 [2023-06-12 17:59:24,392 INFO L226 Difference]: Without dead ends: 3390 [2023-06-12 17:59:24,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:24,393 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 41 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:24,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 394 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2023-06-12 17:59:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3249. [2023-06-12 17:59:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 2215 states have (on average 3.7918735891647857) internal successors, (8399), 2243 states have internal predecessors, (8399), 1030 states have call successors, (1030), 2 states have call predecessors, (1030), 3 states have return successors, (1993), 1003 states have call predecessors, (1993), 1030 states have call successors, (1993) [2023-06-12 17:59:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 11422 transitions. [2023-06-12 17:59:25,447 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 11422 transitions. Word has length 28 [2023-06-12 17:59:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:25,447 INFO L495 AbstractCegarLoop]: Abstraction has 3249 states and 11422 transitions. [2023-06-12 17:59:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 11422 transitions. [2023-06-12 17:59:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 17:59:26,325 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:26,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:26,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-06-12 17:59:26,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:26,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1290215783, now seen corresponding path program 3 times [2023-06-12 17:59:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:26,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156932689] [2023-06-12 17:59:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:26,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:26,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:26,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-06-12 17:59:26,349 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156932689] [2023-06-12 17:59:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [156932689] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896209202] [2023-06-12 17:59:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:26,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:26,350 INFO L87 Difference]: Start difference. First operand 3249 states and 11422 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:27,049 INFO L93 Difference]: Finished difference Result 3501 states and 12118 transitions. [2023-06-12 17:59:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 28 [2023-06-12 17:59:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:27,784 INFO L225 Difference]: With dead ends: 3501 [2023-06-12 17:59:27,784 INFO L226 Difference]: Without dead ends: 3501 [2023-06-12 17:59:27,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:27,784 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 43 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:27,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 392 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2023-06-12 17:59:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3382. [2023-06-12 17:59:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 2288 states have (on average 3.715034965034965) internal successors, (8500), 2316 states have internal predecessors, (8500), 1090 states have call successors, (1090), 2 states have call predecessors, (1090), 3 states have return successors, (2113), 1063 states have call predecessors, (2113), 1090 states have call successors, (2113) [2023-06-12 17:59:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 11703 transitions. [2023-06-12 17:59:28,693 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 11703 transitions. Word has length 28 [2023-06-12 17:59:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:28,693 INFO L495 AbstractCegarLoop]: Abstraction has 3382 states and 11703 transitions. [2023-06-12 17:59:28,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 11703 transitions. [2023-06-12 17:59:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 17:59:29,450 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:29,450 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] [2023-06-12 17:59:29,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-06-12 17:59:29,450 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:29,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1726954229, now seen corresponding path program 1 times [2023-06-12 17:59:29,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:29,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514297454] [2023-06-12 17:59:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:29,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:29,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:29,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:29,497 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:29,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514297454] [2023-06-12 17:59:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514297454] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:29,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162210772] [2023-06-12 17:59:29,498 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:29,500 INFO L87 Difference]: Start difference. First operand 3382 states and 11703 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) [2023-06-12 17:59:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:31,528 INFO L93 Difference]: Finished difference Result 3586 states and 12041 transitions. [2023-06-12 17:59:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 17:59:31,529 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 [2023-06-12 17:59:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:32,125 INFO L225 Difference]: With dead ends: 3586 [2023-06-12 17:59:32,125 INFO L226 Difference]: Without dead ends: 3586 [2023-06-12 17:59:32,125 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 [2023-06-12 17:59:32,126 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 294 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:32,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 361 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-06-12 17:59:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2023-06-12 17:59:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3393. [2023-06-12 17:59:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2288 states have (on average 3.715034965034965) internal successors, (8500), 2327 states have internal predecessors, (8500), 1101 states have call successors, (1101), 2 states have call predecessors, (1101), 3 states have return successors, (1974), 1063 states have call predecessors, (1974), 1101 states have call successors, (1974) [2023-06-12 17:59:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 11575 transitions. [2023-06-12 17:59:33,177 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 11575 transitions. Word has length 30 [2023-06-12 17:59:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:33,178 INFO L495 AbstractCegarLoop]: Abstraction has 3393 states and 11575 transitions. [2023-06-12 17:59:33,178 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) [2023-06-12 17:59:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 11575 transitions. [2023-06-12 17:59:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 17:59:33,848 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:33,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:33,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-06-12 17:59:33,848 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:33,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1973477303, now seen corresponding path program 2 times [2023-06-12 17:59:33,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:33,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476704050] [2023-06-12 17:59:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:33,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:33,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-06-12 17:59:33,873 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476704050] [2023-06-12 17:59:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476704050] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:33,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:33,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504626311] [2023-06-12 17:59:33,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:33,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:33,875 INFO L87 Difference]: Start difference. First operand 3393 states and 11575 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:35,829 INFO L93 Difference]: Finished difference Result 5277 states and 17540 transitions. [2023-06-12 17:59:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:35,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 28 [2023-06-12 17:59:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:37,602 INFO L225 Difference]: With dead ends: 5277 [2023-06-12 17:59:37,602 INFO L226 Difference]: Without dead ends: 5277 [2023-06-12 17:59:37,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:37,603 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 33 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:37,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 292 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2023-06-12 17:59:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 3646. [2023-06-12 17:59:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 2541 states have (on average 4.2743014561196375) internal successors, (10861), 2580 states have internal predecessors, (10861), 1101 states have call successors, (1101), 2 states have call predecessors, (1101), 3 states have return successors, (1974), 1063 states have call predecessors, (1974), 1101 states have call successors, (1974) [2023-06-12 17:59:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13936 transitions. [2023-06-12 17:59:39,137 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13936 transitions. Word has length 28 [2023-06-12 17:59:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:39,138 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13936 transitions. [2023-06-12 17:59:39,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13936 transitions. [2023-06-12 17:59:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 17:59:39,912 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:39,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-06-12 17:59:39,912 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:39,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 669656171, now seen corresponding path program 3 times [2023-06-12 17:59:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684929686] [2023-06-12 17:59:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:39,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:39,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:39,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:39,946 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:39,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684929686] [2023-06-12 17:59:39,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684929686] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:39,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:39,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337092404] [2023-06-12 17:59:39,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:39,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:39,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:39,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:39,948 INFO L87 Difference]: Start difference. First operand 3646 states and 13936 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:41,957 INFO L93 Difference]: Finished difference Result 5277 states and 17393 transitions. [2023-06-12 17:59:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 28 [2023-06-12 17:59:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:43,721 INFO L225 Difference]: With dead ends: 5277 [2023-06-12 17:59:43,721 INFO L226 Difference]: Without dead ends: 5277 [2023-06-12 17:59:43,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:43,721 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 31 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:43,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 294 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2023-06-12 17:59:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 3646. [2023-06-12 17:59:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 2541 states have (on average 4.216450216450217) internal successors, (10714), 2580 states have internal predecessors, (10714), 1101 states have call successors, (1101), 2 states have call predecessors, (1101), 3 states have return successors, (1974), 1063 states have call predecessors, (1974), 1101 states have call successors, (1974) [2023-06-12 17:59:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13789 transitions. [2023-06-12 17:59:45,375 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13789 transitions. Word has length 28 [2023-06-12 17:59:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:45,375 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13789 transitions. [2023-06-12 17:59:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-06-12 17:59:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13789 transitions. [2023-06-12 17:59:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 17:59:46,573 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:46,573 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] [2023-06-12 17:59:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-06-12 17:59:46,573 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:46,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -943657843, now seen corresponding path program 1 times [2023-06-12 17:59:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998502679] [2023-06-12 17:59:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:46,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-06-12 17:59:46,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:46,628 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998502679] [2023-06-12 17:59:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [998502679] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:46,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71693120] [2023-06-12 17:59:46,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:46,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:46,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:46,630 INFO L87 Difference]: Start difference. First operand 3646 states and 13789 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-06-12 17:59:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:48,703 INFO L93 Difference]: Finished difference Result 4473 states and 19111 transitions. [2023-06-12 17:59:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-06-12 17:59:48,704 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), 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 33 [2023-06-12 17:59:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:50,039 INFO L225 Difference]: With dead ends: 4473 [2023-06-12 17:59:50,039 INFO L226 Difference]: Without dead ends: 4473 [2023-06-12 17:59:50,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-06-12 17:59:50,040 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 294 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:50,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 331 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 17:59:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2023-06-12 17:59:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 4302. [2023-06-12 17:59:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 2974 states have (on average 4.216879623402824) internal successors, (12541), 3046 states have internal predecessors, (12541), 1323 states have call successors, (1323), 2 states have call predecessors, (1323), 4 states have return successors, (3617), 1253 states have call predecessors, (3617), 1323 states have call successors, (3617) [2023-06-12 17:59:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 17481 transitions. [2023-06-12 17:59:51,761 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 17481 transitions. Word has length 33 [2023-06-12 17:59:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:51,761 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 17481 transitions. [2023-06-12 17:59:51,761 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), 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) [2023-06-12 17:59:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 17481 transitions. [2023-06-12 17:59:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 17:59:53,546 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:53,546 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] [2023-06-12 17:59:53,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-06-12 17:59:53,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:53,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2027518371, now seen corresponding path program 1 times [2023-06-12 17:59:53,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:53,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988895663] [2023-06-12 17:59:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:53,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:53,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:53,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:53,593 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988895663] [2023-06-12 17:59:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988895663] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:53,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:53,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:53,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005267147] [2023-06-12 17:59:53,594 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:53,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:53,595 INFO L87 Difference]: Start difference. First operand 4302 states and 17481 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-06-12 17:59:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:55,833 INFO L93 Difference]: Finished difference Result 4505 states and 18989 transitions. [2023-06-12 17:59:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 17:59:55,834 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), 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 33 [2023-06-12 17:59:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:56,931 INFO L225 Difference]: With dead ends: 4505 [2023-06-12 17:59:56,932 INFO L226 Difference]: Without dead ends: 4505 [2023-06-12 17:59:56,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 17:59:56,932 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 291 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:56,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 362 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 17:59:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2023-06-12 17:59:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 3646. [2023-06-12 17:59:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 2541 states have (on average 4.216450216450217) internal successors, (10714), 2580 states have internal predecessors, (10714), 1101 states have call successors, (1101), 2 states have call predecessors, (1101), 3 states have return successors, (1974), 1063 states have call predecessors, (1974), 1101 states have call successors, (1974) [2023-06-12 17:59:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13789 transitions. [2023-06-12 17:59:58,164 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13789 transitions. Word has length 33 [2023-06-12 17:59:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:58,164 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13789 transitions. [2023-06-12 17:59:58,164 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), 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) [2023-06-12 17:59:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13789 transitions. [2023-06-12 17:59:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 17:59:59,155 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:59,156 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] [2023-06-12 17:59:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-06-12 17:59:59,156 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:59,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -783493607, now seen corresponding path program 1 times [2023-06-12 17:59:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755531456] [2023-06-12 17:59:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:59,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:59,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:59,194 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755531456] [2023-06-12 17:59:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [755531456] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:59,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:59,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494162391] [2023-06-12 17:59:59,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:59,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:59,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:59,195 INFO L87 Difference]: Start difference. First operand 3646 states and 13789 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-06-12 18:00:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:01,070 INFO L93 Difference]: Finished difference Result 4559 states and 17906 transitions. [2023-06-12 18:00:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:00:01,071 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), 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 33 [2023-06-12 18:00:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:02,404 INFO L225 Difference]: With dead ends: 4559 [2023-06-12 18:00:02,404 INFO L226 Difference]: Without dead ends: 4559 [2023-06-12 18:00:02,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:00:02,405 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 325 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:02,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 318 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-06-12 18:00:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2023-06-12 18:00:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 4318. [2023-06-12 18:00:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 2974 states have (on average 4.216879623402824) internal successors, (12541), 3062 states have internal predecessors, (12541), 1339 states have call successors, (1339), 2 states have call predecessors, (1339), 4 states have return successors, (3377), 1253 states have call predecessors, (3377), 1339 states have call successors, (3377) [2023-06-12 18:00:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 17257 transitions. [2023-06-12 18:00:03,993 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 17257 transitions. Word has length 33 [2023-06-12 18:00:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:03,993 INFO L495 AbstractCegarLoop]: Abstraction has 4318 states and 17257 transitions. [2023-06-12 18:00:03,994 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), 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) [2023-06-12 18:00:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 17257 transitions. [2023-06-12 18:00:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:00:05,834 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:05,834 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] [2023-06-12 18:00:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-06-12 18:00:05,835 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:05,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1357010995, now seen corresponding path program 1 times [2023-06-12 18:00:05,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:05,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306327890] [2023-06-12 18:00:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:05,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:00:05,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 18:00:05,884 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306327890] [2023-06-12 18:00:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [306327890] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:00:05,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:00:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:00:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325573612] [2023-06-12 18:00:05,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:00:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:00:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:00:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:00:05,886 INFO L87 Difference]: Start difference. First operand 4318 states and 17257 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-06-12 18:00:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:11,376 INFO L93 Difference]: Finished difference Result 7454 states and 34176 transitions. [2023-06-12 18:00:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-06-12 18:00:11,377 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), 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 33 [2023-06-12 18:00:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:15,990 INFO L225 Difference]: With dead ends: 7454 [2023-06-12 18:00:15,990 INFO L226 Difference]: Without dead ends: 7454 [2023-06-12 18:00:15,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-06-12 18:00:15,991 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 204 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:15,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 441 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-06-12 18:00:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7454 states. [2023-06-12 18:00:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7454 to 6727. [2023-06-12 18:00:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 4257 states have (on average 4.229269438571764) internal successors, (18004), 4744 states have internal predecessors, (18004), 2462 states have call successors, (2462), 2 states have call predecessors, (2462), 7 states have return successors, (11453), 1980 states have call predecessors, (11453), 2462 states have call successors, (11453) [2023-06-12 18:00:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 31919 transitions. [2023-06-12 18:00:23,973 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 31919 transitions. Word has length 33 [2023-06-12 18:00:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:23,973 INFO L495 AbstractCegarLoop]: Abstraction has 6727 states and 31919 transitions. [2023-06-12 18:00:23,973 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), 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) [2023-06-12 18:00:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 31919 transitions. [2023-06-12 18:00:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:00:27,543 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:27,544 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] [2023-06-12 18:00:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-06-12 18:00:27,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:27,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1713917611, now seen corresponding path program 1 times [2023-06-12 18:00:27,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:27,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872577574] [2023-06-12 18:00:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:27,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:27,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:00:27,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 18:00:27,587 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872577574] [2023-06-12 18:00:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872577574] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:00:27,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:00:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:00:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732814135] [2023-06-12 18:00:27,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:00:27,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:00:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:00:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:00:27,588 INFO L87 Difference]: Start difference. First operand 6727 states and 31919 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-06-12 18:00:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:38,302 INFO L93 Difference]: Finished difference Result 9991 states and 42336 transitions. [2023-06-12 18:00:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:00:38,303 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), 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 33 [2023-06-12 18:00:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:48,141 INFO L225 Difference]: With dead ends: 9991 [2023-06-12 18:00:48,141 INFO L226 Difference]: Without dead ends: 9991 [2023-06-12 18:00:48,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:00:48,141 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 216 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:48,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 435 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-06-12 18:00:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9991 states. [2023-06-12 18:00:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9991 to 7873. [2023-06-12 18:00:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7873 states, 4257 states have (on average 4.229269438571764) internal successors, (18004), 5525 states have internal predecessors, (18004), 3608 states have call successors, (3608), 2 states have call predecessors, (3608), 7 states have return successors, (14252), 2345 states have call predecessors, (14252), 3608 states have call successors, (14252) [2023-06-12 18:01:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7873 states to 7873 states and 35864 transitions. [2023-06-12 18:01:00,225 INFO L78 Accepts]: Start accepts. Automaton has 7873 states and 35864 transitions. Word has length 33 [2023-06-12 18:01:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:00,225 INFO L495 AbstractCegarLoop]: Abstraction has 7873 states and 35864 transitions. [2023-06-12 18:01:00,225 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), 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) [2023-06-12 18:01:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7873 states and 35864 transitions. [2023-06-12 18:01:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-06-12 18:01:10,024 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:10,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-06-12 18:01:10,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:10,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 785593245, now seen corresponding path program 1 times [2023-06-12 18:01:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:10,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80489440] [2023-06-12 18:01:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:10,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjunts are in the unsatisfiable core [2023-06-12 18:01:10,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-06-12 18:01:10,130 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:10,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80489440] [2023-06-12 18:01:10,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [80489440] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:01:10,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:01:10,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-06-12 18:01:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217820591] [2023-06-12 18:01:10,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:01:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-06-12 18:01:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-06-12 18:01:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-06-12 18:01:10,132 INFO L87 Difference]: Start difference. First operand 7873 states and 35864 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2023-06-12 18:01:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:49,541 INFO L93 Difference]: Finished difference Result 18157 states and 82482 transitions. [2023-06-12 18:01:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:01:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 34 [2023-06-12 18:01:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:26,175 INFO L225 Difference]: With dead ends: 18157 [2023-06-12 18:02:26,175 INFO L226 Difference]: Without dead ends: 18157 [2023-06-12 18:02:26,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-06-12 18:02:26,181 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 163 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-06-12 18:02:26,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 417 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-06-12 18:02:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states.