/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-5ab1b01-m [2023-07-03 22:46:54,275 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:46:54,358 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/ThreadModularVerifier.Settings.epf [2023-07-03 22:46:54,399 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:46:54,401 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:46:54,417 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:46:54,418 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:46:54,418 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:46:54,418 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:46:54,429 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:46:54,429 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:46:54,430 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:46:54,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:46:54,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:46:54,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:46:54,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:46:54,725 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:46:54,725 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:46:54,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/add-sub-k.bpl [2023-07-03 22:46:54,728 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-k/add-sub-k.bpl' [2023-07-03 22:46:54,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:46:54,757 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:46:54,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:46:54,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:46:54,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:46:54,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:46:54,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:46:54,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:46:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:46:54,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:46:54,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-07-03 22:46:54,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:46:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:46:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:46:54,975 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:46:54,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:46:54,979 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:46:55,013 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:46:55,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:46:55,037 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:46:55,039 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:55 BoogieIcfgContainer [2023-07-03 22:46:55,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:46:55,047 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:46:55,047 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:46:55,047 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:46:55,049 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:55" (1/1) ... [2023-07-03 22:47:00,402 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - k;' is: true [2023-07-03 22:47:00,410 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + k;' is: true [2023-07-03 22:47:00,411 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'havoc k;' is: true [2023-07-03 22:47:00,429 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,432 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,433 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'havoc k;' is: true [2023-07-03 22:47:00,459 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,475 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,478 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'havoc k;' is: true [2023-07-03 22:47:00,496 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,500 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,510 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'havoc k;' is: true [2023-07-03 22:47:00,522 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - k;' is: true [2023-07-03 22:47:00,524 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + k;' is: true [2023-07-03 22:47:00,534 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'havoc k;' is: true [2023-07-03 22:47:00,594 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00 HornClauseAST [2023-07-03 22:47:00,594 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:47:00,609 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:47:00,609 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:47:00,609 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:47:00,610 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,628 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_UID5490409932993039990.smt2 [2023-07-03 22:47:00,662 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:47:00,663 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:47:00,674 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:47:00,674 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:47:00,675 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,693 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00 Unit [2023-07-03 22:47:00,700 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:47:00,700 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:47:00,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:47:00,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:47:00,709 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:47:00,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:47:00,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:47:00,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:47:00,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:47:00,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:47:00,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:47:00,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-07-03 22:47:00,814 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:47:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:47:00,819 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:47:00,819 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:47:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:47:00,820 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:47:00,853 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:47:00,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:47:01,101 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:47:01,103 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:47:01,103 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:47:01,115 INFO L201 PluginConnector]: Adding new model add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01 BoogieIcfgContainer [2023-07-03 22:47:01,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:47:01,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:47:01,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:47:01,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:47:01,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/5) ... [2023-07-03 22:47:01,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec38b1e and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:55" (2/5) ... [2023-07-03 22:47:01,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec38b1e and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (3/5) ... [2023-07-03 22:47:01,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec38b1e and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (4/5) ... [2023-07-03 22:47:01,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec38b1e and model type add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01" (5/5) ... [2023-07-03 22:47:01,200 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:47:01,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:47:01,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:47:01,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:47:01,362 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;@49ceaa3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:47:01,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:47:01,368 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) [2023-07-03 22:47:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:47:01,385 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:01,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:01,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:01,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1176173027, now seen corresponding path program 1 times [2023-07-03 22:47:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:01,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399721953] [2023-07-03 22:47:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:01,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:01,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:01,562 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399721953] [2023-07-03 22:47:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [399721953] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471489350] [2023-07-03 22:47:01,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:01,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:01,598 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) [2023-07-03 22:47:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:01,973 INFO L93 Difference]: Finished difference Result 186 states and 298 transitions. [2023-07-03 22:47:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:01,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-07-03 22:47:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:01,998 INFO L225 Difference]: With dead ends: 186 [2023-07-03 22:47:01,999 INFO L226 Difference]: Without dead ends: 184 [2023-07-03 22:47:02,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:02,005 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 246 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-07-03 22:47:02,008 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] [2023-07-03 22:47:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-07-03 22:47:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-07-03 22:47:02,086 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) [2023-07-03 22:47:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 296 transitions. [2023-07-03 22:47:02,095 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 296 transitions. Word has length 8 [2023-07-03 22:47:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:02,098 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 296 transitions. [2023-07-03 22:47:02,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 296 transitions. [2023-07-03 22:47:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:47:02,127 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:47:02,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash 342395553, now seen corresponding path program 1 times [2023-07-03 22:47:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44983704] [2023-07-03 22:47:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:02,216 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44983704] [2023-07-03 22:47:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [44983704] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631513479] [2023-07-03 22:47:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,265 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) [2023-07-03 22:47:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:02,577 INFO L93 Difference]: Finished difference Result 316 states and 528 transitions. [2023-07-03 22:47:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:47:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:02,599 INFO L225 Difference]: With dead ends: 316 [2023-07-03 22:47:02,599 INFO L226 Difference]: Without dead ends: 316 [2023-07-03 22:47:02,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:02,607 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 [2023-07-03 22:47:02,615 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] [2023-07-03 22:47:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-07-03 22:47:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 286. [2023-07-03 22:47:02,662 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) [2023-07-03 22:47:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 478 transitions. [2023-07-03 22:47:02,677 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 478 transitions. Word has length 10 [2023-07-03 22:47:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:02,688 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 478 transitions. [2023-07-03 22:47:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 478 transitions. [2023-07-03 22:47:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:47:02,714 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:47:02,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash -284346331, now seen corresponding path program 1 times [2023-07-03 22:47:02,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694792753] [2023-07-03 22:47:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:02,780 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694792753] [2023-07-03 22:47:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694792753] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503371852] [2023-07-03 22:47:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,827 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) [2023-07-03 22:47:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,141 INFO L93 Difference]: Finished difference Result 398 states and 690 transitions. [2023-07-03 22:47:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:47:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,153 INFO L225 Difference]: With dead ends: 398 [2023-07-03 22:47:03,153 INFO L226 Difference]: Without dead ends: 398 [2023-07-03 22:47:03,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,156 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, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 449 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:47:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-07-03 22:47:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 308. [2023-07-03 22:47:03,208 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) [2023-07-03 22:47:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 540 transitions. [2023-07-03 22:47:03,218 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 540 transitions. Word has length 10 [2023-07-03 22:47:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,219 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 540 transitions. [2023-07-03 22:47:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 540 transitions. [2023-07-03 22:47:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:47:03,228 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:47:03,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1550162799, now seen corresponding path program 1 times [2023-07-03 22:47:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593419203] [2023-07-03 22:47:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:03,284 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593419203] [2023-07-03 22:47:03,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593419203] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344806287] [2023-07-03 22:47:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,288 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) [2023-07-03 22:47:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,545 INFO L93 Difference]: Finished difference Result 442 states and 810 transitions. [2023-07-03 22:47:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:47:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,560 INFO L225 Difference]: With dead ends: 442 [2023-07-03 22:47:03,560 INFO L226 Difference]: Without dead ends: 442 [2023-07-03 22:47:03,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,564 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 [2023-07-03 22:47:03,565 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] [2023-07-03 22:47:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-07-03 22:47:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 412. [2023-07-03 22:47:03,590 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) [2023-07-03 22:47:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 760 transitions. [2023-07-03 22:47:03,609 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 760 transitions. Word has length 13 [2023-07-03 22:47:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,609 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 760 transitions. [2023-07-03 22:47:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 760 transitions. [2023-07-03 22:47:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:47:03,622 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:47:03,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2069077533, now seen corresponding path program 1 times [2023-07-03 22:47:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770326875] [2023-07-03 22:47:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:03,674 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770326875] [2023-07-03 22:47:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770326875] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518224623] [2023-07-03 22:47:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,675 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) [2023-07-03 22:47:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,943 INFO L93 Difference]: Finished difference Result 648 states and 1248 transitions. [2023-07-03 22:47:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:47:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,975 INFO L225 Difference]: With dead ends: 648 [2023-07-03 22:47:03,979 INFO L226 Difference]: Without dead ends: 648 [2023-07-03 22:47:03,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,980 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 [2023-07-03 22:47:03,999 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] [2023-07-03 22:47:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-07-03 22:47:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 438. [2023-07-03 22:47:04,056 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) [2023-07-03 22:47:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 898 transitions. [2023-07-03 22:47:04,065 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 898 transitions. Word has length 13 [2023-07-03 22:47:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,065 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 898 transitions. [2023-07-03 22:47:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 898 transitions. [2023-07-03 22:47:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:47:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:47:04,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -305590995, now seen corresponding path program 1 times [2023-07-03 22:47:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731956514] [2023-07-03 22:47:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:47:04,187 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731956514] [2023-07-03 22:47:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [731956514] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916838232] [2023-07-03 22:47:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,227 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) [2023-07-03 22:47:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,458 INFO L93 Difference]: Finished difference Result 574 states and 1212 transitions. [2023-07-03 22:47:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:47:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,478 INFO L225 Difference]: With dead ends: 574 [2023-07-03 22:47:04,478 INFO L226 Difference]: Without dead ends: 574 [2023-07-03 22:47:04,479 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 [2023-07-03 22:47:04,479 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 40 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-07-03 22:47:04,480 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] [2023-07-03 22:47:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-07-03 22:47:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 544. [2023-07-03 22:47:04,526 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) [2023-07-03 22:47:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1162 transitions. [2023-07-03 22:47:04,536 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1162 transitions. Word has length 16 [2023-07-03 22:47:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,536 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 1162 transitions. [2023-07-03 22:47:04,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1162 transitions. [2023-07-03 22:47:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:47:04,564 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:47:04,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1919382999, now seen corresponding path program 1 times [2023-07-03 22:47:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591211375] [2023-07-03 22:47:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:47:04,592 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591211375] [2023-07-03 22:47:04,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591211375] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546953835] [2023-07-03 22:47:04,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,593 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) [2023-07-03 22:47:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,846 INFO L93 Difference]: Finished difference Result 842 states and 1798 transitions. [2023-07-03 22:47:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:47:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,883 INFO L225 Difference]: With dead ends: 842 [2023-07-03 22:47:04,883 INFO L226 Difference]: Without dead ends: 842 [2023-07-03 22:47:04,884 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 [2023-07-03 22:47:04,884 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 [2023-07-03 22:47:04,889 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] [2023-07-03 22:47:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-07-03 22:47:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 572. [2023-07-03 22:47:04,936 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) [2023-07-03 22:47:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1348 transitions. [2023-07-03 22:47:04,949 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1348 transitions. Word has length 16 [2023-07-03 22:47:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,949 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 1348 transitions. [2023-07-03 22:47:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1348 transitions. [2023-07-03 22:47:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:47:05,003 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:05,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:05,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:47:05,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:05,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1506290913, now seen corresponding path program 1 times [2023-07-03 22:47:05,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:05,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74012165] [2023-07-03 22:47:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:05,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:05,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:05,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:47:05,045 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74012165] [2023-07-03 22:47:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [74012165] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:05,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:05,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186952627] [2023-07-03 22:47:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:05,047 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) [2023-07-03 22:47:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:05,291 INFO L93 Difference]: Finished difference Result 710 states and 1712 transitions. [2023-07-03 22:47:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:05,291 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 [2023-07-03 22:47:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:05,314 INFO L225 Difference]: With dead ends: 710 [2023-07-03 22:47:05,314 INFO L226 Difference]: Without dead ends: 710 [2023-07-03 22:47:05,315 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 [2023-07-03 22:47:05,316 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 [2023-07-03 22:47:05,316 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] [2023-07-03 22:47:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-07-03 22:47:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 680. [2023-07-03 22:47:05,350 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) [2023-07-03 22:47:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1662 transitions. [2023-07-03 22:47:05,368 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1662 transitions. Word has length 19 [2023-07-03 22:47:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:05,369 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1662 transitions. [2023-07-03 22:47:05,369 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) [2023-07-03 22:47:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1662 transitions. [2023-07-03 22:47:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:47:05,465 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:05,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:47:05,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:05,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1522379945, now seen corresponding path program 1 times [2023-07-03 22:47:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:05,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094081297] [2023-07-03 22:47:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:05,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:05,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:47:05,523 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094081297] [2023-07-03 22:47:05,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094081297] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:05,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:05,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:05,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610031985] [2023-07-03 22:47:05,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:05,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:05,525 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) [2023-07-03 22:47:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:05,801 INFO L93 Difference]: Finished difference Result 1040 states and 2452 transitions. [2023-07-03 22:47:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:05,802 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 [2023-07-03 22:47:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:05,858 INFO L225 Difference]: With dead ends: 1040 [2023-07-03 22:47:05,858 INFO L226 Difference]: Without dead ends: 1040 [2023-07-03 22:47:05,858 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 [2023-07-03 22:47:05,860 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 [2023-07-03 22:47:05,861 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] [2023-07-03 22:47:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2023-07-03 22:47:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 710. [2023-07-03 22:47:05,924 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) [2023-07-03 22:47:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1902 transitions. [2023-07-03 22:47:05,941 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1902 transitions. Word has length 19 [2023-07-03 22:47:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:05,942 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1902 transitions. [2023-07-03 22:47:05,942 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) [2023-07-03 22:47:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1902 transitions. [2023-07-03 22:47:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:47:06,013 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:06,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:47:06,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1887328477, now seen corresponding path program 1 times [2023-07-03 22:47:06,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834071299] [2023-07-03 22:47:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:06,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:06,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:06,055 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834071299] [2023-07-03 22:47:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834071299] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:06,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:06,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:06,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092913630] [2023-07-03 22:47:06,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:06,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:06,057 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) [2023-07-03 22:47:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,288 INFO L93 Difference]: Finished difference Result 850 states and 2322 transitions. [2023-07-03 22:47:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:47:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,341 INFO L225 Difference]: With dead ends: 850 [2023-07-03 22:47:06,341 INFO L226 Difference]: Without dead ends: 850 [2023-07-03 22:47:06,341 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 [2023-07-03 22:47:06,342 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 44 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-07-03 22:47:06,342 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] [2023-07-03 22:47:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-07-03 22:47:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 820. [2023-07-03 22:47:06,381 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) [2023-07-03 22:47:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2272 transitions. [2023-07-03 22:47:06,405 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2272 transitions. Word has length 22 [2023-07-03 22:47:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:06,405 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 2272 transitions. [2023-07-03 22:47:06,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2272 transitions. [2023-07-03 22:47:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:47:06,497 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:47:06,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1398621755, now seen corresponding path program 1 times [2023-07-03 22:47:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837896037] [2023-07-03 22:47:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:06,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:06,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:06,523 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837896037] [2023-07-03 22:47:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837896037] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:06,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206209115] [2023-07-03 22:47:06,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:06,525 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) [2023-07-03 22:47:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,818 INFO L93 Difference]: Finished difference Result 1242 states and 3222 transitions. [2023-07-03 22:47:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:06,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:47:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,902 INFO L225 Difference]: With dead ends: 1242 [2023-07-03 22:47:06,902 INFO L226 Difference]: Without dead ends: 1242 [2023-07-03 22:47:06,903 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 [2023-07-03 22:47:06,903 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 [2023-07-03 22:47:06,904 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] [2023-07-03 22:47:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2023-07-03 22:47:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 852. [2023-07-03 22:47:07,005 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) [2023-07-03 22:47:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2572 transitions. [2023-07-03 22:47:07,032 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2572 transitions. Word has length 22 [2023-07-03 22:47:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 2572 transitions. [2023-07-03 22:47:07,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2572 transitions. [2023-07-03 22:47:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:07,142 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:07,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:07,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:47:07,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:07,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:07,143 INFO L85 PathProgramCache]: Analyzing trace with hash -616128429, now seen corresponding path program 1 times [2023-07-03 22:47:07,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:07,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042031763] [2023-07-03 22:47:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:07,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:07,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:07,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:47:07,187 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:07,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042031763] [2023-07-03 22:47:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042031763] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:07,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:07,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269449678] [2023-07-03 22:47:07,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:07,189 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) [2023-07-03 22:47:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:08,602 INFO L93 Difference]: Finished difference Result 1395 states and 4495 transitions. [2023-07-03 22:47:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-07-03 22:47:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:47:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:08,786 INFO L225 Difference]: With dead ends: 1395 [2023-07-03 22:47:08,786 INFO L226 Difference]: Without dead ends: 1394 [2023-07-03 22:47:08,786 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 [2023-07-03 22:47:08,787 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 [2023-07-03 22:47:08,787 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] [2023-07-03 22:47:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-07-03 22:47:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1269. [2023-07-03 22:47:08,982 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) [2023-07-03 22:47:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4163 transitions. [2023-07-03 22:47:09,060 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4163 transitions. Word has length 27 [2023-07-03 22:47:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:09,060 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 4163 transitions. [2023-07-03 22:47:09,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:47:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4163 transitions. [2023-07-03 22:47:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:09,288 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:09,288 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] [2023-07-03 22:47:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:47:09,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:09,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2086894901, now seen corresponding path program 1 times [2023-07-03 22:47:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049446107] [2023-07-03 22:47:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:09,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-07-03 22:47:09,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:47:09,378 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049446107] [2023-07-03 22:47:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049446107] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:09,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474492494] [2023-07-03 22:47:09,378 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:09,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:09,380 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) [2023-07-03 22:47:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:10,132 INFO L93 Difference]: Finished difference Result 2127 states and 6761 transitions. [2023-07-03 22:47:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-07-03 22:47:10,132 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 [2023-07-03 22:47:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:10,418 INFO L225 Difference]: With dead ends: 2127 [2023-07-03 22:47:10,419 INFO L226 Difference]: Without dead ends: 2127 [2023-07-03 22:47:10,419 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 [2023-07-03 22:47:10,419 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 [2023-07-03 22:47:10,420 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] [2023-07-03 22:47:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2023-07-03 22:47:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1785. [2023-07-03 22:47:10,745 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) [2023-07-03 22:47:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 5941 transitions. [2023-07-03 22:47:10,880 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 5941 transitions. Word has length 25 [2023-07-03 22:47:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:10,880 INFO L495 AbstractCegarLoop]: Abstraction has 1785 states and 5941 transitions. [2023-07-03 22:47:10,880 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) [2023-07-03 22:47:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 5941 transitions. [2023-07-03 22:47:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:11,188 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:11,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:11,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:47:11,188 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:11,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash -408455353, now seen corresponding path program 1 times [2023-07-03 22:47:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:11,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397501962] [2023-07-03 22:47:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:11,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:11,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:11,231 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:11,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397501962] [2023-07-03 22:47:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397501962] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:11,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:11,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195385054] [2023-07-03 22:47:11,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:11,233 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) [2023-07-03 22:47:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:11,973 INFO L93 Difference]: Finished difference Result 2705 states and 8561 transitions. [2023-07-03 22:47:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:47:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:12,425 INFO L225 Difference]: With dead ends: 2705 [2023-07-03 22:47:12,426 INFO L226 Difference]: Without dead ends: 2705 [2023-07-03 22:47:12,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:12,426 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 [2023-07-03 22:47:12,427 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] [2023-07-03 22:47:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2023-07-03 22:47:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1817. [2023-07-03 22:47:12,865 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) [2023-07-03 22:47:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 6217 transitions. [2023-07-03 22:47:12,975 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 6217 transitions. Word has length 27 [2023-07-03 22:47:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:12,975 INFO L495 AbstractCegarLoop]: Abstraction has 1817 states and 6217 transitions. [2023-07-03 22:47:12,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:47:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 6217 transitions. [2023-07-03 22:47:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:13,314 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:13,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:13,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:47:13,315 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:13,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash -938747117, now seen corresponding path program 1 times [2023-07-03 22:47:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:13,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354025124] [2023-07-03 22:47:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:13,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:13,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:13,345 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:13,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354025124] [2023-07-03 22:47:13,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354025124] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:13,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:13,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561440286] [2023-07-03 22:47:13,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:13,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:13,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:13,347 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) [2023-07-03 22:47:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:13,806 INFO L93 Difference]: Finished difference Result 2113 states and 7243 transitions. [2023-07-03 22:47:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:47:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:14,016 INFO L225 Difference]: With dead ends: 2113 [2023-07-03 22:47:14,016 INFO L226 Difference]: Without dead ends: 2113 [2023-07-03 22:47:14,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:14,017 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 [2023-07-03 22:47:14,017 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] [2023-07-03 22:47:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2023-07-03 22:47:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1885. [2023-07-03 22:47:14,324 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) [2023-07-03 22:47:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-07-03 22:47:14,468 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-07-03 22:47:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:14,468 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-07-03 22:47:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:47:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-07-03 22:47:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:14,702 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:14,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:14,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:47:14,703 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:14,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1794990457, now seen corresponding path program 1 times [2023-07-03 22:47:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:14,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672836297] [2023-07-03 22:47:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:14,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:14,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:14,737 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672836297] [2023-07-03 22:47:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672836297] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598678077] [2023-07-03 22:47:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:14,738 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) [2023-07-03 22:47:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:15,495 INFO L93 Difference]: Finished difference Result 2857 states and 9363 transitions. [2023-07-03 22:47:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:47:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:16,064 INFO L225 Difference]: With dead ends: 2857 [2023-07-03 22:47:16,064 INFO L226 Difference]: Without dead ends: 2857 [2023-07-03 22:47:16,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:16,065 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 [2023-07-03 22:47:16,065 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] [2023-07-03 22:47:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2023-07-03 22:47:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 1885. [2023-07-03 22:47:16,477 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) [2023-07-03 22:47:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-07-03 22:47:16,593 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-07-03 22:47:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:16,593 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-07-03 22:47:16,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:47:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-07-03 22:47:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:16,956 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:16,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:47:16,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:16,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:16,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1529844575, now seen corresponding path program 1 times [2023-07-03 22:47:16,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:16,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569732474] [2023-07-03 22:47:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:16,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:16,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:16,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:16,990 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569732474] [2023-07-03 22:47:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [569732474] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:16,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094630183] [2023-07-03 22:47:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:16,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:16,992 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) [2023-07-03 22:47:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:17,421 INFO L93 Difference]: Finished difference Result 2278 states and 7855 transitions. [2023-07-03 22:47:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:17,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:47:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:17,823 INFO L225 Difference]: With dead ends: 2278 [2023-07-03 22:47:17,823 INFO L226 Difference]: Without dead ends: 2278 [2023-07-03 22:47:17,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:17,824 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 46 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:17,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 380 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2023-07-03 22:47:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1885. [2023-07-03 22:47:18,076 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) [2023-07-03 22:47:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6499 transitions. [2023-07-03 22:47:18,205 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6499 transitions. Word has length 27 [2023-07-03 22:47:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:18,206 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6499 transitions. [2023-07-03 22:47:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:47:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6499 transitions. [2023-07-03 22:47:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:18,609 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:18,609 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] [2023-07-03 22:47:18,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:47:18,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:18,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash 761581309, now seen corresponding path program 1 times [2023-07-03 22:47:18,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:18,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399933764] [2023-07-03 22:47:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:18,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:18,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-07-03 22:47:18,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:47:18,720 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399933764] [2023-07-03 22:47:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399933764] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:18,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:18,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770379129] [2023-07-03 22:47:18,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:18,724 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) [2023-07-03 22:47:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:19,724 INFO L93 Difference]: Finished difference Result 3327 states and 11263 transitions. [2023-07-03 22:47:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-07-03 22:47:19,725 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 [2023-07-03 22:47:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:20,242 INFO L225 Difference]: With dead ends: 3327 [2023-07-03 22:47:20,242 INFO L226 Difference]: Without dead ends: 3327 [2023-07-03 22:47:20,242 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 [2023-07-03 22:47:20,243 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 65 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:20,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 511 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:47:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2023-07-03 22:47:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2749. [2023-07-03 22:47:20,718 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) [2023-07-03 22:47:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 9891 transitions. [2023-07-03 22:47:20,939 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 9891 transitions. Word has length 25 [2023-07-03 22:47:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:20,939 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 9891 transitions. [2023-07-03 22:47:20,940 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) [2023-07-03 22:47:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 9891 transitions. [2023-07-03 22:47:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:21,610 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:21,610 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] [2023-07-03 22:47:21,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-07-03 22:47:21,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:21,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:21,611 INFO L85 PathProgramCache]: Analyzing trace with hash -824980073, now seen corresponding path program 2 times [2023-07-03 22:47:21,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:21,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515142545] [2023-07-03 22:47:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:21,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:21,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:21,639 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:21,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515142545] [2023-07-03 22:47:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515142545] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:21,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:21,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102401620] [2023-07-03 22:47:21,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:21,653 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) [2023-07-03 22:47:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:22,491 INFO L93 Difference]: Finished difference Result 3390 states and 11987 transitions. [2023-07-03 22:47:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:22,492 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 [2023-07-03 22:47:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:23,175 INFO L225 Difference]: With dead ends: 3390 [2023-07-03 22:47:23,175 INFO L226 Difference]: Without dead ends: 3390 [2023-07-03 22:47:23,177 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 [2023-07-03 22:47:23,179 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 41 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:23,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 394 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:47:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2023-07-03 22:47:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3249. [2023-07-03 22:47:23,605 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) [2023-07-03 22:47:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 11422 transitions. [2023-07-03 22:47:24,066 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 11422 transitions. Word has length 28 [2023-07-03 22:47:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 3249 states and 11422 transitions. [2023-07-03 22:47:24,067 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) [2023-07-03 22:47:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 11422 transitions. [2023-07-03 22:47:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:24,808 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:24,808 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] [2023-07-03 22:47:24,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-07-03 22:47:24,808 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:24,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1290215783, now seen corresponding path program 3 times [2023-07-03 22:47:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:24,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674798780] [2023-07-03 22:47:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:24,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:24,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-07-03 22:47:24,836 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674798780] [2023-07-03 22:47:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674798780] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:24,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:24,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385769406] [2023-07-03 22:47:24,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:24,837 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) [2023-07-03 22:47:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:25,678 INFO L93 Difference]: Finished difference Result 3501 states and 12118 transitions. [2023-07-03 22:47:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:25,678 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 [2023-07-03 22:47:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:26,230 INFO L225 Difference]: With dead ends: 3501 [2023-07-03 22:47:26,230 INFO L226 Difference]: Without dead ends: 3501 [2023-07-03 22:47:26,230 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 [2023-07-03 22:47:26,231 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 [2023-07-03 22:47:26,231 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] [2023-07-03 22:47:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2023-07-03 22:47:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3382. [2023-07-03 22:47:26,876 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) [2023-07-03 22:47:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 11703 transitions. [2023-07-03 22:47:27,399 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 11703 transitions. Word has length 28 [2023-07-03 22:47:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:27,400 INFO L495 AbstractCegarLoop]: Abstraction has 3382 states and 11703 transitions. [2023-07-03 22:47:27,400 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) [2023-07-03 22:47:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 11703 transitions. [2023-07-03 22:47:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:47:28,205 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:28,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-07-03 22:47:28,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:28,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1726954229, now seen corresponding path program 1 times [2023-07-03 22:47:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836927860] [2023-07-03 22:47:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:28,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:28,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:47:28,247 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:28,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836927860] [2023-07-03 22:47:28,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [836927860] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:28,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:28,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997562859] [2023-07-03 22:47:28,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:28,249 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) [2023-07-03 22:47:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:30,035 INFO L93 Difference]: Finished difference Result 3586 states and 12041 transitions. [2023-07-03 22:47:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:47:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-07-03 22:47:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:30,632 INFO L225 Difference]: With dead ends: 3586 [2023-07-03 22:47:30,632 INFO L226 Difference]: Without dead ends: 3586 [2023-07-03 22:47:30,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:47:30,633 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 294 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:30,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 361 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-07-03 22:47:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2023-07-03 22:47:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3393. [2023-07-03 22:47:31,275 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) [2023-07-03 22:47:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 11575 transitions. [2023-07-03 22:47:31,924 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 11575 transitions. Word has length 30 [2023-07-03 22:47:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:31,924 INFO L495 AbstractCegarLoop]: Abstraction has 3393 states and 11575 transitions. [2023-07-03 22:47:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:47:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 11575 transitions. [2023-07-03 22:47:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:32,509 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:32,509 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] [2023-07-03 22:47:32,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-07-03 22:47:32,509 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:32,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1973477303, now seen corresponding path program 2 times [2023-07-03 22:47:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:32,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44583057] [2023-07-03 22:47:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:32,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:32,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-07-03 22:47:32,531 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:32,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44583057] [2023-07-03 22:47:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [44583057] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:32,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930104865] [2023-07-03 22:47:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:32,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:32,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:32,532 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) [2023-07-03 22:47:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:34,546 INFO L93 Difference]: Finished difference Result 5277 states and 17540 transitions. [2023-07-03 22:47:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:34,546 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 [2023-07-03 22:47:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:36,279 INFO L225 Difference]: With dead ends: 5277 [2023-07-03 22:47:36,279 INFO L226 Difference]: Without dead ends: 5277 [2023-07-03 22:47:36,280 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 [2023-07-03 22:47:36,281 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 33 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-07-03 22:47:36,281 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] [2023-07-03 22:47:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2023-07-03 22:47:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 3646. [2023-07-03 22:47:37,291 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) [2023-07-03 22:47:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13936 transitions. [2023-07-03 22:47:38,026 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13936 transitions. Word has length 28 [2023-07-03 22:47:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:38,027 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13936 transitions. [2023-07-03 22:47:38,027 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) [2023-07-03 22:47:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13936 transitions. [2023-07-03 22:47:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:38,610 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:38,610 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] [2023-07-03 22:47:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-07-03 22:47:38,611 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:38,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash 669656171, now seen corresponding path program 3 times [2023-07-03 22:47:38,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:38,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826883743] [2023-07-03 22:47:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:38,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:38,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:38,632 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826883743] [2023-07-03 22:47:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [826883743] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33462002] [2023-07-03 22:47:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:38,634 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) [2023-07-03 22:47:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:40,620 INFO L93 Difference]: Finished difference Result 5277 states and 17393 transitions. [2023-07-03 22:47:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:40,620 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 [2023-07-03 22:47:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:42,403 INFO L225 Difference]: With dead ends: 5277 [2023-07-03 22:47:42,404 INFO L226 Difference]: Without dead ends: 5277 [2023-07-03 22:47:42,404 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 [2023-07-03 22:47:42,404 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 [2023-07-03 22:47:42,404 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] [2023-07-03 22:47:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2023-07-03 22:47:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 3646. [2023-07-03 22:47:43,535 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) [2023-07-03 22:47:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13789 transitions. [2023-07-03 22:47:44,319 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13789 transitions. Word has length 28 [2023-07-03 22:47:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:44,319 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13789 transitions. [2023-07-03 22:47:44,320 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) [2023-07-03 22:47:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13789 transitions. [2023-07-03 22:47:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:47:45,494 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:45,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:45,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-07-03 22:47:45,495 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:45,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash -943657843, now seen corresponding path program 1 times [2023-07-03 22:47:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:45,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984846254] [2023-07-03 22:47:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:45,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:47:45,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:45,548 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984846254] [2023-07-03 22:47:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984846254] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:45,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608151372] [2023-07-03 22:47:45,549 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:45,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:45,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:45,550 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) [2023-07-03 22:47:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:47,695 INFO L93 Difference]: Finished difference Result 4473 states and 19111 transitions. [2023-07-03 22:47:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-07-03 22:47:47,696 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 [2023-07-03 22:47:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:48,701 INFO L225 Difference]: With dead ends: 4473 [2023-07-03 22:47:48,702 INFO L226 Difference]: Without dead ends: 4473 [2023-07-03 22:47:48,703 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 [2023-07-03 22:47:48,703 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 294 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2023-07-03 22:47:48,704 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] [2023-07-03 22:47:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2023-07-03 22:47:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 4302. [2023-07-03 22:47:49,576 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) [2023-07-03 22:47:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 17481 transitions. [2023-07-03 22:47:50,543 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 17481 transitions. Word has length 33 [2023-07-03 22:47:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:50,543 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 17481 transitions. [2023-07-03 22:47:50,544 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) [2023-07-03 22:47:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 17481 transitions. [2023-07-03 22:47:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:47:52,051 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:52,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-07-03 22:47:52,051 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:52,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2027518371, now seen corresponding path program 1 times [2023-07-03 22:47:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:52,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769401144] [2023-07-03 22:47:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:52,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:52,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:47:52,093 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769401144] [2023-07-03 22:47:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [769401144] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:52,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707649909] [2023-07-03 22:47:52,094 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:52,094 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) [2023-07-03 22:47:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:54,378 INFO L93 Difference]: Finished difference Result 4505 states and 18989 transitions. [2023-07-03 22:47:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:47:54,379 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 [2023-07-03 22:47:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:55,747 INFO L225 Difference]: With dead ends: 4505 [2023-07-03 22:47:55,747 INFO L226 Difference]: Without dead ends: 4505 [2023-07-03 22:47:55,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:47:55,748 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 291 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:55,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 362 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-07-03 22:47:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2023-07-03 22:47:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 3646. [2023-07-03 22:47:56,390 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) [2023-07-03 22:47:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 13789 transitions. [2023-07-03 22:47:56,990 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 13789 transitions. Word has length 33 [2023-07-03 22:47:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:56,991 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 13789 transitions. [2023-07-03 22:47:56,991 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) [2023-07-03 22:47:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 13789 transitions. [2023-07-03 22:47:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:47:58,134 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:58,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-07-03 22:47:58,134 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:58,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -783493607, now seen corresponding path program 1 times [2023-07-03 22:47:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304286544] [2023-07-03 22:47:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:58,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:58,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:58,174 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:58,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304286544] [2023-07-03 22:47:58,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304286544] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:58,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:58,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588598342] [2023-07-03 22:47:58,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:58,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:58,177 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) [2023-07-03 22:48:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:00,238 INFO L93 Difference]: Finished difference Result 4559 states and 17906 transitions. [2023-07-03 22:48:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:48:00,239 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 [2023-07-03 22:48:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:01,304 INFO L225 Difference]: With dead ends: 4559 [2023-07-03 22:48:01,304 INFO L226 Difference]: Without dead ends: 4559 [2023-07-03 22:48:01,304 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 [2023-07-03 22:48:01,305 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 [2023-07-03 22:48:01,305 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] [2023-07-03 22:48:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2023-07-03 22:48:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 4318. [2023-07-03 22:48:02,261 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) [2023-07-03 22:48:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 17257 transitions. [2023-07-03 22:48:03,244 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 17257 transitions. Word has length 33 [2023-07-03 22:48:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:03,244 INFO L495 AbstractCegarLoop]: Abstraction has 4318 states and 17257 transitions. [2023-07-03 22:48:03,244 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) [2023-07-03 22:48:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 17257 transitions. [2023-07-03 22:48:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:48:04,622 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:04,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:48:04,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-07-03 22:48:04,622 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:04,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1357010995, now seen corresponding path program 1 times [2023-07-03 22:48:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:04,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461182215] [2023-07-03 22:48:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:04,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:04,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:48:04,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:48:04,660 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461182215] [2023-07-03 22:48:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461182215] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:48:04,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:48:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:48:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530967794] [2023-07-03 22:48:04,660 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:48:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:48:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:48:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:48:04,661 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) [2023-07-03 22:48:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:10,251 INFO L93 Difference]: Finished difference Result 7454 states and 34176 transitions. [2023-07-03 22:48:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-07-03 22:48:10,252 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 [2023-07-03 22:48:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:14,466 INFO L225 Difference]: With dead ends: 7454 [2023-07-03 22:48:14,466 INFO L226 Difference]: Without dead ends: 7454 [2023-07-03 22:48:14,466 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 [2023-07-03 22:48:14,466 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 [2023-07-03 22:48:14,467 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] [2023-07-03 22:48:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7454 states. [2023-07-03 22:48:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7454 to 6727. [2023-07-03 22:48:17,643 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) [2023-07-03 22:48:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 31919 transitions. [2023-07-03 22:48:22,381 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 31919 transitions. Word has length 33 [2023-07-03 22:48:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:22,381 INFO L495 AbstractCegarLoop]: Abstraction has 6727 states and 31919 transitions. [2023-07-03 22:48:22,382 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) [2023-07-03 22:48:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 31919 transitions. [2023-07-03 22:48:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-07-03 22:48:26,219 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:26,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:48:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-07-03 22:48:26,219 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:26,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1713917611, now seen corresponding path program 1 times [2023-07-03 22:48:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570033939] [2023-07-03 22:48:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:26,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:48:26,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:48:26,286 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570033939] [2023-07-03 22:48:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [570033939] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:48:26,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:48:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:48:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695435947] [2023-07-03 22:48:26,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:48:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:48:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:48:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:48:26,287 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) [2023-07-03 22:48:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:36,682 INFO L93 Difference]: Finished difference Result 9991 states and 42336 transitions. [2023-07-03 22:48:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:48:36,682 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 [2023-07-03 22:48:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:45,028 INFO L225 Difference]: With dead ends: 9991 [2023-07-03 22:48:45,029 INFO L226 Difference]: Without dead ends: 9991 [2023-07-03 22:48:45,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:48:45,030 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 [2023-07-03 22:48:45,030 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] [2023-07-03 22:48:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9991 states. [2023-07-03 22:48:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9991 to 7873. [2023-07-03 22:48:51,143 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) [2023-07-03 22:48:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7873 states to 7873 states and 35864 transitions. [2023-07-03 22:48:56,940 INFO L78 Accepts]: Start accepts. Automaton has 7873 states and 35864 transitions. Word has length 33 [2023-07-03 22:48:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:56,940 INFO L495 AbstractCegarLoop]: Abstraction has 7873 states and 35864 transitions. [2023-07-03 22:48:56,940 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) [2023-07-03 22:48:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7873 states and 35864 transitions. [2023-07-03 22:49:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-07-03 22:49:06,613 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:06,614 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] [2023-07-03 22:49:06,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-07-03 22:49:06,614 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:06,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash 785593245, now seen corresponding path program 1 times [2023-07-03 22:49:06,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841542848] [2023-07-03 22:49:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:06,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjunts are in the unsatisfiable core [2023-07-03 22:49:06,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-07-03 22:49:06,796 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:06,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841542848] [2023-07-03 22:49:06,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [841542848] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:49:06,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:49:06,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-07-03 22:49:06,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435214059] [2023-07-03 22:49:06,797 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:49:06,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-07-03 22:49:06,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-07-03 22:49:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-07-03 22:49:06,798 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) [2023-07-03 22:49:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:45,468 INFO L93 Difference]: Finished difference Result 18157 states and 82482 transitions. [2023-07-03 22:49:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:49:45,469 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 [2023-07-03 22:49:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:50:19,432 INFO L225 Difference]: With dead ends: 18157 [2023-07-03 22:50:19,432 INFO L226 Difference]: Without dead ends: 18157 [2023-07-03 22:50:19,432 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 [2023-07-03 22:50:19,433 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 163 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:50:19,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 417 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:50:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states.