/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-positive-k/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:46:53,843 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:46:53,911 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/ThreadModularVerifier.Settings.epf [2023-07-03 22:46:53,919 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:46:53,921 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:46:53,921 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:46:53,921 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:46:53,922 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:46:53,922 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:46:53,926 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:46:53,927 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:46:53,927 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:46:53,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:46:54,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:46:54,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:46:54,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:46:54,134 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:46:54,142 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:46:54,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl [2023-07-03 22:46:54,144 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl' [2023-07-03 22:46:54,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:46:54,160 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:46:54,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:46:54,161 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:46:54,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:46:54,179 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:46:54,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:46:54,180 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:46:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:46:54,198 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 22:46:54,210 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 22:46:54,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:46:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:46:54,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:46:54,253 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:46:54,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:46:54,256 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:46:54,293 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:46:54,297 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:46:54,297 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:46:54,298 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54 BoogieIcfgContainer [2023-07-03 22:46:54,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:46:54,299 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:46:54,299 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:46:54,299 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:46:54,300 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54" (1/1) ... [2023-07-03 22:47:00,396 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - k;' is: true [2023-07-03 22:47:00,399 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + k;' is: true [2023-07-03 22:47:00,416 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,421 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'havoc k;' is: true [2023-07-03 22:47:00,445 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,448 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,451 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,453 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'havoc k;' is: true [2023-07-03 22:47:00,463 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'x := x - k;' is: true [2023-07-03 22:47:00,471 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'x := x + k;' is: true [2023-07-03 22:47:00,473 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,475 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'havoc k;' is: true [2023-07-03 22:47:00,492 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,504 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,507 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,509 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'havoc k;' is: true [2023-07-03 22:47:00,542 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x - k;' is: true [2023-07-03 22:47:00,550 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x + k;' is: true [2023-07-03 22:47:00,555 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,558 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'havoc k;' is: true [2023-07-03 22:47:00,570 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - k;' is: true [2023-07-03 22:47:00,573 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + k;' is: true [2023-07-03 22:47:00,576 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume k >= 0;' is: true [2023-07-03 22:47:00,582 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'havoc k;' is: true [2023-07-03 22:47:00,681 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00 HornClauseAST [2023-07-03 22:47:00,681 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:47:00,682 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:47:00,700 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:47:00,700 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:47:00,701 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,710 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/CHC_add-sub-positive-k.bpl_UID7742697779299735668.smt2 [2023-07-03 22:47:00,734 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:47:00,735 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:47:00,737 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:47:00,737 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:47:00,738 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,757 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00 Unit [2023-07-03 22:47:00,764 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:47:00,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:47:00,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:47:00,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:47:00,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-positive-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 L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:47:00,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:47:00,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:47:00,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:47:00,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (1/1) ... [2023-07-03 22:47:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:47:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:47:00,850 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 22:47:00,867 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:47:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:47:00,867 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:47:00,875 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:47:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:47:00,875 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:47:00,888 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:47:00,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:47:00,868 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 22:47:01,174 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:47:01,180 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:47:01,181 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:47:01,182 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01 BoogieIcfgContainer [2023-07-03 22:47:01,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:47:01,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:47:01,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:47:01,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:47:01,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/5) ... [2023-07-03 22:47:01,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5c710 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54" (2/5) ... [2023-07-03 22:47:01,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5c710 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:00" (3/5) ... [2023-07-03 22:47:01,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5c710 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:00" (4/5) ... [2023-07-03 22:47:01,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5c710 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01" (5/5) ... [2023-07-03 22:47:01,284 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:47:01,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:47:01,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:47:01,356 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;@27c7eb8, 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 22:47:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-07-03 22:47:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:47:01,389 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:01,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:01,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:01,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash 874916787, now seen corresponding path program 1 times [2023-07-03 22:47:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831969650] [2023-07-03 22:47:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:01,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:01,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:01,563 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 22:47:01,564 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:01,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831969650] [2023-07-03 22:47:01,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831969650] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:01,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:01,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360096962] [2023-07-03 22:47:01,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:01,590 INFO L87 Difference]: Start difference. First operand has 112 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) 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 22:47:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:01,965 INFO L93 Difference]: Finished difference Result 218 states and 352 transitions. [2023-07-03 22:47:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:01,967 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 22:47:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:01,981 INFO L225 Difference]: With dead ends: 218 [2023-07-03 22:47:01,981 INFO L226 Difference]: Without dead ends: 216 [2023-07-03 22:47:01,982 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 22:47:01,985 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 291 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:01,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 250 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:47:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-07-03 22:47:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-07-03 22:47:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 140 states have (on average 1.457142857142857) internal successors, (204), 140 states have internal predecessors, (204), 73 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-07-03 22:47:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 350 transitions. [2023-07-03 22:47:02,042 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 350 transitions. Word has length 8 [2023-07-03 22:47:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:02,043 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 350 transitions. [2023-07-03 22:47:02,043 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 22:47:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 350 transitions. [2023-07-03 22:47:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:47:02,049 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:47:02,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash -499745737, now seen corresponding path program 1 times [2023-07-03 22:47:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594813622] [2023-07-03 22:47:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,073 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 22:47:02,073 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594813622] [2023-07-03 22:47:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [594813622] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570131175] [2023-07-03 22:47:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,076 INFO L87 Difference]: Start difference. First operand 216 states and 350 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 22:47:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:02,320 INFO L93 Difference]: Finished difference Result 374 states and 628 transitions. [2023-07-03 22:47:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:02,324 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 22:47:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:02,342 INFO L225 Difference]: With dead ends: 374 [2023-07-03 22:47:02,343 INFO L226 Difference]: Without dead ends: 374 [2023-07-03 22:47:02,343 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 22:47:02,356 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 43 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:02,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 562 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-07-03 22:47:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 338. [2023-07-03 22:47:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 214 states have (on average 1.5233644859813085) internal successors, (326), 214 states have internal predecessors, (326), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:47:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2023-07-03 22:47:02,444 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 10 [2023-07-03 22:47:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:02,444 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2023-07-03 22:47:02,462 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 22:47:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2023-07-03 22:47:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:47:02,476 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:47:02,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1126487621, now seen corresponding path program 1 times [2023-07-03 22:47:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989463874] [2023-07-03 22:47:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,563 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 22:47:02,564 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989463874] [2023-07-03 22:47:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [989463874] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781358422] [2023-07-03 22:47:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,606 INFO L87 Difference]: Start difference. First operand 338 states and 568 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 22:47:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:02,903 INFO L93 Difference]: Finished difference Result 472 states and 822 transitions. [2023-07-03 22:47:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:02,909 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 22:47:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:02,928 INFO L225 Difference]: With dead ends: 472 [2023-07-03 22:47:02,928 INFO L226 Difference]: Without dead ends: 472 [2023-07-03 22:47:02,929 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 22:47:02,939 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 31 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:02,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 532 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-07-03 22:47:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 364. [2023-07-03 22:47:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 240 states have (on average 1.6666666666666667) internal successors, (400), 240 states have internal predecessors, (400), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:47:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 642 transitions. [2023-07-03 22:47:03,009 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 642 transitions. Word has length 10 [2023-07-03 22:47:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,010 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 642 transitions. [2023-07-03 22:47:03,020 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 22:47:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 642 transitions. [2023-07-03 22:47:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:47:03,035 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:47:03,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1058531361, now seen corresponding path program 1 times [2023-07-03 22:47:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038484433] [2023-07-03 22:47:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,087 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 22:47:03,088 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038484433] [2023-07-03 22:47:03,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038484433] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818432568] [2023-07-03 22:47:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,098 INFO L87 Difference]: Start difference. First operand 364 states and 642 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 22:47:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,314 INFO L93 Difference]: Finished difference Result 524 states and 964 transitions. [2023-07-03 22:47:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,315 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 22:47:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,326 INFO L225 Difference]: With dead ends: 524 [2023-07-03 22:47:03,326 INFO L226 Difference]: Without dead ends: 524 [2023-07-03 22:47:03,327 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 22:47:03,330 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 45 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 560 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-07-03 22:47:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 488. [2023-07-03 22:47:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 316 states have (on average 1.7911392405063291) internal successors, (566), 316 states have internal predecessors, (566), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:47:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 904 transitions. [2023-07-03 22:47:03,370 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 904 transitions. Word has length 13 [2023-07-03 22:47:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,371 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 904 transitions. [2023-07-03 22:47:03,371 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 22:47:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 904 transitions. [2023-07-03 22:47:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:47:03,382 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:47:03,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1470147669, now seen corresponding path program 1 times [2023-07-03 22:47:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488851102] [2023-07-03 22:47:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,431 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 22:47:03,431 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488851102] [2023-07-03 22:47:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [488851102] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920609301] [2023-07-03 22:47:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,433 INFO L87 Difference]: Start difference. First operand 488 states and 904 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 22:47:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,694 INFO L93 Difference]: Finished difference Result 770 states and 1486 transitions. [2023-07-03 22:47:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,695 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 22:47:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,720 INFO L225 Difference]: With dead ends: 770 [2023-07-03 22:47:03,720 INFO L226 Difference]: Without dead ends: 770 [2023-07-03 22:47:03,720 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 22:47:03,721 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 33 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 530 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-07-03 22:47:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 518. [2023-07-03 22:47:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 346 states have (on average 2.1040462427745665) internal successors, (728), 346 states have internal predecessors, (728), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:47:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1066 transitions. [2023-07-03 22:47:03,768 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1066 transitions. Word has length 13 [2023-07-03 22:47:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,768 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 1066 transitions. [2023-07-03 22:47:03,768 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 22:47:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1066 transitions. [2023-07-03 22:47:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:47:03,786 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:47:03,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 459087399, now seen corresponding path program 1 times [2023-07-03 22:47:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970299225] [2023-07-03 22:47:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,837 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 22:47:03,837 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970299225] [2023-07-03 22:47:03,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [970299225] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427767282] [2023-07-03 22:47:03,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,839 INFO L87 Difference]: Start difference. First operand 518 states and 1066 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 22:47:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,068 INFO L93 Difference]: Finished difference Result 680 states and 1438 transitions. [2023-07-03 22:47:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:04,084 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 22:47:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,111 INFO L225 Difference]: With dead ends: 680 [2023-07-03 22:47:04,111 INFO L226 Difference]: Without dead ends: 680 [2023-07-03 22:47:04,111 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 22:47:04,113 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 47 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:04,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 558 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-07-03 22:47:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 644. [2023-07-03 22:47:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 424 states have (on average 2.2264150943396226) internal successors, (944), 424 states have internal predecessors, (944), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-07-03 22:47:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1378 transitions. [2023-07-03 22:47:04,189 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1378 transitions. Word has length 16 [2023-07-03 22:47:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,199 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1378 transitions. [2023-07-03 22:47:04,199 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 22:47:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1378 transitions. [2023-07-03 22:47:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:47:04,241 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:47:04,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash -106265135, now seen corresponding path program 1 times [2023-07-03 22:47:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765761393] [2023-07-03 22:47:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,326 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 22:47:04,327 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765761393] [2023-07-03 22:47:04,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765761393] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105473624] [2023-07-03 22:47:04,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,329 INFO L87 Difference]: Start difference. First operand 644 states and 1378 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 22:47:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,593 INFO L93 Difference]: Finished difference Result 1000 states and 2134 transitions. [2023-07-03 22:47:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:04,593 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 22:47:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,629 INFO L225 Difference]: With dead ends: 1000 [2023-07-03 22:47:04,629 INFO L226 Difference]: Without dead ends: 1000 [2023-07-03 22:47:04,629 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 22:47:04,630 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 35 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:04,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 528 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-07-03 22:47:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 676. [2023-07-03 22:47:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 456 states have (on average 2.543859649122807) internal successors, (1160), 456 states have internal predecessors, (1160), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-07-03 22:47:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1594 transitions. [2023-07-03 22:47:04,720 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1594 transitions. Word has length 16 [2023-07-03 22:47:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,720 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1594 transitions. [2023-07-03 22:47:04,720 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 22:47:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1594 transitions. [2023-07-03 22:47:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:47:04,761 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,761 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 22:47:04,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:47:04,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1972636312, now seen corresponding path program 1 times [2023-07-03 22:47:04,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493267666] [2023-07-03 22:47:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,784 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 22:47:04,784 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493267666] [2023-07-03 22:47:04,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [493267666] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872387767] [2023-07-03 22:47:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,785 INFO L87 Difference]: Start difference. First operand 676 states and 1594 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 22:47:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:05,012 INFO L93 Difference]: Finished difference Result 840 states and 2022 transitions. [2023-07-03 22:47:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:05,013 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 22:47:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:05,038 INFO L225 Difference]: With dead ends: 840 [2023-07-03 22:47:05,038 INFO L226 Difference]: Without dead ends: 840 [2023-07-03 22:47:05,039 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 22:47:05,039 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 49 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:05,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 556 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-07-03 22:47:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 804. [2023-07-03 22:47:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 536 states have (on average 2.671641791044776) internal successors, (1432), 536 states have internal predecessors, (1432), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-07-03 22:47:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1962 transitions. [2023-07-03 22:47:05,098 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1962 transitions. Word has length 19 [2023-07-03 22:47:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:05,101 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1962 transitions. [2023-07-03 22:47:05,102 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 22:47:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1962 transitions. [2023-07-03 22:47:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:47:05,153 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:05,153 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 22:47:05,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:47:05,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:05,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1408467446, now seen corresponding path program 1 times [2023-07-03 22:47:05,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:05,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403504721] [2023-07-03 22:47:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:05,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:05,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:05,196 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 22:47:05,197 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:05,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403504721] [2023-07-03 22:47:05,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403504721] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:05,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:05,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579667399] [2023-07-03 22:47:05,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:05,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:05,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:05,198 INFO L87 Difference]: Start difference. First operand 804 states and 1962 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 22:47:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:05,493 INFO L93 Difference]: Finished difference Result 1234 states and 2898 transitions. [2023-07-03 22:47:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:05,493 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 22:47:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:05,545 INFO L225 Difference]: With dead ends: 1234 [2023-07-03 22:47:05,545 INFO L226 Difference]: Without dead ends: 1234 [2023-07-03 22:47:05,546 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 22:47:05,547 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 37 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:05,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 526 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2023-07-03 22:47:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 838. [2023-07-03 22:47:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 570 states have (on average 2.9964912280701754) internal successors, (1708), 570 states have internal predecessors, (1708), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-07-03 22:47:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2238 transitions. [2023-07-03 22:47:05,634 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2238 transitions. Word has length 19 [2023-07-03 22:47:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:05,634 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 2238 transitions. [2023-07-03 22:47:05,635 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 22:47:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2238 transitions. [2023-07-03 22:47:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:47:05,712 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:05,712 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 22:47:05,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:47:05,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:05,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2114387954, now seen corresponding path program 1 times [2023-07-03 22:47:05,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:05,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062678627] [2023-07-03 22:47:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:05,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:05,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:05,767 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 22:47:05,768 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062678627] [2023-07-03 22:47:05,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062678627] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:05,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:05,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:05,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993924708] [2023-07-03 22:47:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:05,769 INFO L87 Difference]: Start difference. First operand 838 states and 2238 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 22:47:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,031 INFO L93 Difference]: Finished difference Result 1004 states and 2728 transitions. [2023-07-03 22:47:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:06,031 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 22:47:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,095 INFO L225 Difference]: With dead ends: 1004 [2023-07-03 22:47:06,095 INFO L226 Difference]: Without dead ends: 1004 [2023-07-03 22:47:06,095 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 22:47:06,095 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 51 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 554 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-07-03 22:47:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 968. [2023-07-03 22:47:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 652 states have (on average 3.1319018404907975) internal successors, (2042), 652 states have internal predecessors, (2042), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:47:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2668 transitions. [2023-07-03 22:47:06,169 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2668 transitions. Word has length 22 [2023-07-03 22:47:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:06,169 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 2668 transitions. [2023-07-03 22:47:06,170 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 22:47:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2668 transitions. [2023-07-03 22:47:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:47:06,274 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,274 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 22:47:06,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:47:06,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -85300501, now seen corresponding path program 1 times [2023-07-03 22:47:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016773637] [2023-07-03 22:47:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:06,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:06,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:06,295 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 22:47:06,295 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016773637] [2023-07-03 22:47:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016773637] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:06,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:06,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289785249] [2023-07-03 22:47:06,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:06,296 INFO L87 Difference]: Start difference. First operand 968 states and 2668 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 22:47:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,603 INFO L93 Difference]: Finished difference Result 1472 states and 3790 transitions. [2023-07-03 22:47:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:06,604 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 22:47:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,686 INFO L225 Difference]: With dead ends: 1472 [2023-07-03 22:47:06,687 INFO L226 Difference]: Without dead ends: 1472 [2023-07-03 22:47:06,687 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 22:47:06,687 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 39 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:06,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 524 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-07-03 22:47:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1004. [2023-07-03 22:47:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 688 states have (on average 3.4651162790697674) internal successors, (2384), 688 states have internal predecessors, (2384), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:47:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3010 transitions. [2023-07-03 22:47:06,859 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3010 transitions. Word has length 22 [2023-07-03 22:47:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:06,870 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 3010 transitions. [2023-07-03 22:47:06,871 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 22:47:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3010 transitions. [2023-07-03 22:47:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:06,988 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,988 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 22:47:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:47:06,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1280717697, now seen corresponding path program 1 times [2023-07-03 22:47:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008534314] [2023-07-03 22:47:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:07,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:07,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:07,048 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 22:47:07,049 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:07,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008534314] [2023-07-03 22:47:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008534314] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:07,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688783141] [2023-07-03 22:47:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:07,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:07,050 INFO L87 Difference]: Start difference. First operand 1004 states and 3010 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 22:47:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:07,357 INFO L93 Difference]: Finished difference Result 1170 states and 3518 transitions. [2023-07-03 22:47:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:07,357 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 22:47:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:07,404 INFO L225 Difference]: With dead ends: 1170 [2023-07-03 22:47:07,404 INFO L226 Difference]: Without dead ends: 1170 [2023-07-03 22:47:07,405 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 22:47:07,405 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 61 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:07,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 417 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2023-07-03 22:47:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1134. [2023-07-03 22:47:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 770 states have (on average 3.553246753246753) internal successors, (2736), 770 states have internal predecessors, (2736), 361 states have call successors, (361), 2 states have call predecessors, (361), 2 states have return successors, (361), 361 states have call predecessors, (361), 361 states have call successors, (361) [2023-07-03 22:47:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3458 transitions. [2023-07-03 22:47:07,522 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3458 transitions. Word has length 27 [2023-07-03 22:47:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:07,522 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 3458 transitions. [2023-07-03 22:47:07,522 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 22:47:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3458 transitions. [2023-07-03 22:47:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:07,648 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:07,648 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 22:47:07,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:47:07,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:07,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2064997264, now seen corresponding path program 1 times [2023-07-03 22:47:07,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:07,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035846114] [2023-07-03 22:47:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:07,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:07,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:07,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:47:07,668 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:07,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035846114] [2023-07-03 22:47:07,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035846114] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:07,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443941253] [2023-07-03 22:47:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:07,669 INFO L87 Difference]: Start difference. First operand 1134 states and 3458 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:07,927 INFO L93 Difference]: Finished difference Result 1302 states and 4016 transitions. [2023-07-03 22:47:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:07,990 INFO L225 Difference]: With dead ends: 1302 [2023-07-03 22:47:07,990 INFO L226 Difference]: Without dead ends: 1302 [2023-07-03 22:47:07,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 22:47:07,991 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 53 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 552 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2023-07-03 22:47:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1136. [2023-07-03 22:47:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 772 states have (on average 3.6088082901554404) internal successors, (2786), 772 states have internal predecessors, (2786), 361 states have call successors, (361), 2 states have call predecessors, (361), 2 states have return successors, (361), 361 states have call predecessors, (361), 361 states have call successors, (361) [2023-07-03 22:47:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3508 transitions. [2023-07-03 22:47:08,123 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3508 transitions. Word has length 25 [2023-07-03 22:47:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:08,123 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 3508 transitions. [2023-07-03 22:47:08,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3508 transitions. [2023-07-03 22:47:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:08,275 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:08,276 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 22:47:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:47:08,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:08,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1075949671, now seen corresponding path program 1 times [2023-07-03 22:47:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:08,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786193871] [2023-07-03 22:47:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:08,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:08,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:47:08,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:08,344 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 22:47:08,344 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:08,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786193871] [2023-07-03 22:47:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786193871] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:08,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-07-03 22:47:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498523186] [2023-07-03 22:47:08,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-07-03 22:47:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-07-03 22:47:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:47:08,346 INFO L87 Difference]: Start difference. First operand 1136 states and 3508 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 22:47:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:10,061 INFO L93 Difference]: Finished difference Result 3215 states and 10635 transitions. [2023-07-03 22:47:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:47:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 22:47:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:10,686 INFO L225 Difference]: With dead ends: 3215 [2023-07-03 22:47:10,686 INFO L226 Difference]: Without dead ends: 3214 [2023-07-03 22:47:10,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-07-03 22:47:10,687 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 413 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:10,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 613 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-07-03 22:47:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2023-07-03 22:47:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2678. [2023-07-03 22:47:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1809 states have (on average 3.632946379215036) internal successors, (6572), 1810 states have internal predecessors, (6572), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-07-03 22:47:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 9114 transitions. [2023-07-03 22:47:11,490 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 9114 transitions. Word has length 27 [2023-07-03 22:47:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:11,491 INFO L495 AbstractCegarLoop]: Abstraction has 2678 states and 9114 transitions. [2023-07-03 22:47:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 22:47:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 9114 transitions. [2023-07-03 22:47:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:12,053 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:12,053 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 22:47:12,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:47:12,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:12,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1514376571, now seen corresponding path program 1 times [2023-07-03 22:47:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:12,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846245381] [2023-07-03 22:47:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:12,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:12,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:12,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:12,078 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 22:47:12,078 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:12,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846245381] [2023-07-03 22:47:12,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846245381] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:12,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:12,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762211982] [2023-07-03 22:47:12,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:12,079 INFO L87 Difference]: Start difference. First operand 2678 states and 9114 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 22:47:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:13,254 INFO L93 Difference]: Finished difference Result 3508 states and 11436 transitions. [2023-07-03 22:47:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:13,255 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 22:47:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:14,035 INFO L225 Difference]: With dead ends: 3508 [2023-07-03 22:47:14,036 INFO L226 Difference]: Without dead ends: 3508 [2023-07-03 22:47:14,036 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 22:47:14,036 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 34 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:14,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 477 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2023-07-03 22:47:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2678. [2023-07-03 22:47:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1809 states have (on average 3.632946379215036) internal successors, (6572), 1810 states have internal predecessors, (6572), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-07-03 22:47:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 9114 transitions. [2023-07-03 22:47:15,014 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 9114 transitions. Word has length 27 [2023-07-03 22:47:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:15,018 INFO L495 AbstractCegarLoop]: Abstraction has 2678 states and 9114 transitions. [2023-07-03 22:47:15,018 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 22:47:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 9114 transitions. [2023-07-03 22:47:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:47:15,569 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:15,569 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 22:47:15,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:47:15,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:15,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1469195449, now seen corresponding path program 1 times [2023-07-03 22:47:15,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:15,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715368843] [2023-07-03 22:47:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:15,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:15,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:15,626 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 22:47:15,626 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715368843] [2023-07-03 22:47:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [715368843] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:15,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123250088] [2023-07-03 22:47:15,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:15,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:15,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:15,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:15,627 INFO L87 Difference]: Start difference. First operand 2678 states and 9114 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 22:47:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:17,014 INFO L93 Difference]: Finished difference Result 4131 states and 13708 transitions. [2023-07-03 22:47:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:17,015 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 22:47:17,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:18,087 INFO L225 Difference]: With dead ends: 4131 [2023-07-03 22:47:18,088 INFO L226 Difference]: Without dead ends: 4131 [2023-07-03 22:47:18,088 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 22:47:18,092 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 54 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:18,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 397 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2023-07-03 22:47:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2779. [2023-07-03 22:47:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1910 states have (on average 4.019895287958115) internal successors, (7678), 1911 states have internal predecessors, (7678), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-07-03 22:47:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 10220 transitions. [2023-07-03 22:47:19,173 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 10220 transitions. Word has length 27 [2023-07-03 22:47:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:19,173 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 10220 transitions. [2023-07-03 22:47:19,174 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 22:47:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 10220 transitions. [2023-07-03 22:47:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:19,753 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:19,753 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 22:47:19,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:47:19,753 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:19,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1507467851, now seen corresponding path program 1 times [2023-07-03 22:47:19,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:19,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83400166] [2023-07-03 22:47:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:19,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:19,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:19,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:47:19,774 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83400166] [2023-07-03 22:47:19,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [83400166] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:19,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:19,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669252447] [2023-07-03 22:47:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:19,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:19,775 INFO L87 Difference]: Start difference. First operand 2779 states and 10220 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:21,176 INFO L93 Difference]: Finished difference Result 4232 states and 14814 transitions. [2023-07-03 22:47:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:22,509 INFO L225 Difference]: With dead ends: 4232 [2023-07-03 22:47:22,509 INFO L226 Difference]: Without dead ends: 4232 [2023-07-03 22:47:22,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 22:47:22,510 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 41 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:22,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 369 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2023-07-03 22:47:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 2779. [2023-07-03 22:47:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1910 states have (on average 4.019895287958115) internal successors, (7678), 1911 states have internal predecessors, (7678), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-07-03 22:47:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 10220 transitions. [2023-07-03 22:47:23,614 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 10220 transitions. Word has length 25 [2023-07-03 22:47:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:23,614 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 10220 transitions. [2023-07-03 22:47:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 22:47:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 10220 transitions. [2023-07-03 22:47:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:47:24,441 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:24,441 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 22:47:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:47:24,441 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:24,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -278089621, now seen corresponding path program 1 times [2023-07-03 22:47:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123126003] [2023-07-03 22:47:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:24,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:24,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-07-03 22:47:24,473 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123126003] [2023-07-03 22:47:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [123126003] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:24,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082528394] [2023-07-03 22:47:24,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:24,474 INFO L87 Difference]: Start difference. First operand 2779 states and 10220 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 22:47:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:26,946 INFO L93 Difference]: Finished difference Result 4565 states and 19108 transitions. [2023-07-03 22:47:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-07-03 22:47:26,947 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 22:47:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:28,518 INFO L225 Difference]: With dead ends: 4565 [2023-07-03 22:47:28,519 INFO L226 Difference]: Without dead ends: 4565 [2023-07-03 22:47:28,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 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 22:47:28,520 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 353 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 418 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-07-03 22:47:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2023-07-03 22:47:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 4217. [2023-07-03 22:47:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4217 states, 2860 states have (on average 4.001398601398601) internal successors, (11444), 2901 states have internal predecessors, (11444), 1351 states have call successors, (1351), 2 states have call predecessors, (1351), 5 states have return successors, (5167), 1313 states have call predecessors, (5167), 1351 states have call successors, (5167) [2023-07-03 22:47:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4217 states to 4217 states and 17962 transitions. [2023-07-03 22:47:30,536 INFO L78 Accepts]: Start accepts. Automaton has 4217 states and 17962 transitions. Word has length 30 [2023-07-03 22:47:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:30,537 INFO L495 AbstractCegarLoop]: Abstraction has 4217 states and 17962 transitions. [2023-07-03 22:47:30,537 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 22:47:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4217 states and 17962 transitions. [2023-07-03 22:47:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:47:32,128 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:32,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-07-03 22:47:32,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:32,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1207497967, now seen corresponding path program 1 times [2023-07-03 22:47:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:32,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017905862] [2023-07-03 22:47:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:32,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:32,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:32,163 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 22:47:32,163 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:32,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017905862] [2023-07-03 22:47:32,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017905862] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:32,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:32,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:32,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334305161] [2023-07-03 22:47:32,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:32,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:32,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:32,165 INFO L87 Difference]: Start difference. First operand 4217 states and 17962 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 22:47:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:34,539 INFO L93 Difference]: Finished difference Result 4631 states and 19186 transitions. [2023-07-03 22:47:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:47:34,540 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 22:47:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:35,968 INFO L225 Difference]: With dead ends: 4631 [2023-07-03 22:47:35,968 INFO L226 Difference]: Without dead ends: 4631 [2023-07-03 22:47:35,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:47:35,968 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 336 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:35,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 447 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-07-03 22:47:35,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2023-07-03 22:47:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4235. [2023-07-03 22:47:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 2860 states have (on average 4.001398601398601) internal successors, (11444), 2919 states have internal predecessors, (11444), 1369 states have call successors, (1369), 2 states have call predecessors, (1369), 5 states have return successors, (5083), 1313 states have call predecessors, (5083), 1369 states have call successors, (5083) [2023-07-03 22:47:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 17896 transitions. [2023-07-03 22:47:38,342 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 17896 transitions. Word has length 30 [2023-07-03 22:47:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:38,342 INFO L495 AbstractCegarLoop]: Abstraction has 4235 states and 17896 transitions. [2023-07-03 22:47:38,342 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 22:47:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 17896 transitions. [2023-07-03 22:47:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:39,669 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:39,670 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] [2023-07-03 22:47:39,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-07-03 22:47:39,670 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:39,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 833545500, now seen corresponding path program 1 times [2023-07-03 22:47:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390944380] [2023-07-03 22:47:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:39,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-07-03 22:47:39,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:47:39,724 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390944380] [2023-07-03 22:47:39,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390944380] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:39,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871567633] [2023-07-03 22:47:39,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:39,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:39,725 INFO L87 Difference]: Start difference. First operand 4235 states and 17896 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:47:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:42,560 INFO L93 Difference]: Finished difference Result 6187 states and 25596 transitions. [2023-07-03 22:47:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-07-03 22:47:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:47:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:45,031 INFO L225 Difference]: With dead ends: 6187 [2023-07-03 22:47:45,032 INFO L226 Difference]: Without dead ends: 6187 [2023-07-03 22:47:45,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 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 22:47:45,032 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 86 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:45,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 637 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:47:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2023-07-03 22:47:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 5539. [2023-07-03 22:47:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 3754 states have (on average 4.0580713905167825) internal successors, (15234), 3827 states have internal predecessors, (15234), 1779 states have call successors, (1779), 2 states have call predecessors, (1779), 5 states have return successors, (6505), 1709 states have call predecessors, (6505), 1779 states have call successors, (6505) [2023-07-03 22:47:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 23518 transitions. [2023-07-03 22:47:48,098 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 23518 transitions. Word has length 28 [2023-07-03 22:47:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:48,098 INFO L495 AbstractCegarLoop]: Abstraction has 5539 states and 23518 transitions. [2023-07-03 22:47:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:47:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 23518 transitions. [2023-07-03 22:47:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:47:50,205 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:50,205 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 22:47:50,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-07-03 22:47:50,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:50,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1437858919, now seen corresponding path program 1 times [2023-07-03 22:47:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531791608] [2023-07-03 22:47:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:50,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:50,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:50,230 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531791608] [2023-07-03 22:47:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531791608] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:50,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304600773] [2023-07-03 22:47:50,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:50,231 INFO L87 Difference]: Start difference. First operand 5539 states and 23518 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:47:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:55,862 INFO L93 Difference]: Finished difference Result 8215 states and 34660 transitions. [2023-07-03 22:47:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:47:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:02,549 INFO L225 Difference]: With dead ends: 8215 [2023-07-03 22:48:02,549 INFO L226 Difference]: Without dead ends: 8215 [2023-07-03 22:48:02,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:48:02,550 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 39 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:48:02,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 457 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:48:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8215 states. [2023-07-03 22:48:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8215 to 5539. [2023-07-03 22:48:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 3754 states have (on average 4.0580713905167825) internal successors, (15234), 3827 states have internal predecessors, (15234), 1779 states have call successors, (1779), 2 states have call predecessors, (1779), 5 states have return successors, (6505), 1709 states have call predecessors, (6505), 1779 states have call successors, (6505) [2023-07-03 22:48:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 23518 transitions. [2023-07-03 22:48:06,725 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 23518 transitions. Word has length 30 [2023-07-03 22:48:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:06,726 INFO L495 AbstractCegarLoop]: Abstraction has 5539 states and 23518 transitions. [2023-07-03 22:48:06,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:48:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 23518 transitions. [2023-07-03 22:48:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:48:08,710 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:08,710 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] [2023-07-03 22:48:08,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-07-03 22:48:08,711 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:08,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash 474578921, now seen corresponding path program 1 times [2023-07-03 22:48:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928138021] [2023-07-03 22:48:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:08,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:08,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-07-03 22:48:08,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:48:08,790 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928138021] [2023-07-03 22:48:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [928138021] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:48:08,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:48:08,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:48:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366013774] [2023-07-03 22:48:08,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:48:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:48:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:48:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:48:08,791 INFO L87 Difference]: Start difference. First operand 5539 states and 23518 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:48:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:12,707 INFO L93 Difference]: Finished difference Result 8401 states and 34790 transitions. [2023-07-03 22:48:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-07-03 22:48:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:48:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:16,861 INFO L225 Difference]: With dead ends: 8401 [2023-07-03 22:48:16,861 INFO L226 Difference]: Without dead ends: 8401 [2023-07-03 22:48:16,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 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 22:48:16,862 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 78 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:48:16,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 630 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:48:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2023-07-03 22:48:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 7315. [2023-07-03 22:48:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 4996 states have (on average 4.120896717373899) internal successors, (20588), 5091 states have internal predecessors, (20588), 2313 states have call successors, (2313), 2 states have call predecessors, (2313), 5 states have return successors, (8351), 2221 states have call predecessors, (8351), 2313 states have call successors, (8351) [2023-07-03 22:48:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 31252 transitions. [2023-07-03 22:48:23,771 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 31252 transitions. Word has length 28 [2023-07-03 22:48:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:23,771 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 31252 transitions. [2023-07-03 22:48:23,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 22:48:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 31252 transitions. [2023-07-03 22:48:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:48:26,290 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:26,290 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 22:48:26,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-07-03 22:48:26,290 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:26,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1712803812, now seen corresponding path program 1 times [2023-07-03 22:48:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651716717] [2023-07-03 22:48:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:26,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:26,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:48:26,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:48:26,313 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651716717] [2023-07-03 22:48:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651716717] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:48:26,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:48:26,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:48:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290106250] [2023-07-03 22:48:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:48:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:48:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:48:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:48:26,314 INFO L87 Difference]: Start difference. First operand 7315 states and 31252 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:48:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:34,589 INFO L93 Difference]: Finished difference Result 10689 states and 46146 transitions. [2023-07-03 22:48:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:48:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:48:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:44,372 INFO L225 Difference]: With dead ends: 10689 [2023-07-03 22:48:44,373 INFO L226 Difference]: Without dead ends: 10689 [2023-07-03 22:48:44,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:48:44,373 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 44 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:48:44,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 437 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:48:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2023-07-03 22:48:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 7315. [2023-07-03 22:48:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 4996 states have (on average 4.120896717373899) internal successors, (20588), 5091 states have internal predecessors, (20588), 2313 states have call successors, (2313), 2 states have call predecessors, (2313), 5 states have return successors, (8351), 2221 states have call predecessors, (8351), 2313 states have call successors, (8351) [2023-07-03 22:48:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 31252 transitions. [2023-07-03 22:48:51,255 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 31252 transitions. Word has length 30 [2023-07-03 22:48:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:51,256 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 31252 transitions. [2023-07-03 22:48:51,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:48:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 31252 transitions. [2023-07-03 22:48:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:48:53,962 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:53,962 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 22:48:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-07-03 22:48:53,962 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:53,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash -98297135, now seen corresponding path program 1 times [2023-07-03 22:48:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145637630] [2023-07-03 22:48:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:53,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:48:53,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:48:53,982 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145637630] [2023-07-03 22:48:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145637630] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:48:53,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:48:53,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:48:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478016258] [2023-07-03 22:48:53,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:48:53,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:48:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:53,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:48:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:48:53,983 INFO L87 Difference]: Start difference. First operand 7315 states and 31252 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:48:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:58,369 INFO L93 Difference]: Finished difference Result 8337 states and 35892 transitions. [2023-07-03 22:48:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:48:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:48:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted.