/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/inc-dec-eq0-locked/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-3a8dd60-m [2023-06-12 18:01:11,916 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-06-12 18:01:11,959 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/ThreadModularVerifier.Settings.epf [2023-06-12 18:01:11,965 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-06-12 18:01:11,966 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-06-12 18:01:11,966 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-06-12 18:01:11,966 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-06-12 18:01:11,966 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-06-12 18:01:11,967 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-06-12 18:01:11,967 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-06-12 18:01:11,968 INFO L137 SettingsManager]: * Save file in source directory=true [2023-06-12 18:01:11,968 INFO L137 SettingsManager]: * Use automatic naming=true [2023-06-12 18:01:11,968 INFO L137 SettingsManager]: * File name=CHC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-06-12 18:01:12,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-06-12 18:01:12,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-06-12 18:01:12,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-06-12 18:01:12,159 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-06-12 18:01:12,160 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-06-12 18:01:12,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl [2023-06-12 18:01:12,161 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl' [2023-06-12 18:01:12,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-06-12 18:01:12,182 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-06-12 18:01:12,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 18:01:12,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 18:01:12,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 18:01:12,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,204 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 18:01:12,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 18:01:12,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 18:01:12,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 18:01:12,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 18:01:12,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 18:01:12,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 18:01:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-06-12 18:01:12,267 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2023-06-12 18:01:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-06-12 18:01:12,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-06-12 18:01:12,300 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 18:01:12,301 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 18:01:12,304 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-06-12 18:01:12,345 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 18:01:12,352 INFO L294 CfgBuilder]: Using library mode [2023-06-12 18:01:12,352 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 18:01:12,354 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:01:12 BoogieIcfgContainer [2023-06-12 18:01:12,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 18:01:12,354 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-06-12 18:01:12,354 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-06-12 18:01:12,354 INFO L274 PluginConnector]: IcfgToChc initialized [2023-06-12 18:01:12,356 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,531 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,534 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,538 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,541 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,545 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,549 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,552 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,556 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,558 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,559 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,588 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'assume !lock;lock := true;' is: false [2023-06-12 18:01:12,592 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,596 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,601 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,606 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,608 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,610 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,611 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,613 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,617 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'assume !lock;lock := true;' is: true [2023-06-12 18:01:12,629 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,637 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,644 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,649 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,655 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,659 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,662 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,663 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,677 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,679 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,688 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,697 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,701 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,703 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,705 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,707 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,709 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,710 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,712 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,713 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,719 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,720 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,722 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,723 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,724 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,726 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,727 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,729 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,731 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,732 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,737 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,738 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,739 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,740 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,742 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,743 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,745 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,746 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,748 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,749 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 18:01:12,753 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,754 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,756 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,757 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,759 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,760 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,761 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,762 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,764 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,765 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,769 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,770 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,771 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,772 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,774 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,775 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,776 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,777 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,778 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,779 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,783 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,784 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,786 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,787 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,788 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,789 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,790 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,791 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,792 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,794 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,797 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,798 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,800 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,801 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,802 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,803 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,804 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,805 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,806 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,807 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 18:01:12,811 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'lock := false;' is: true [2023-06-12 18:01:12,812 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,813 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,814 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,815 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,816 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,817 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,818 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,819 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-06-12 18:01:12,820 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'lock := false;' is: false [2023-06-12 18:01:12,822 INFO L111 IndependenceChecker]: instantiated independence condition for 'lock := false;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,823 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,824 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,825 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,826 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,827 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,827 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,828 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,829 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,830 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 18:01:12,870 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:01:12 HornClauseAST [2023-06-12 18:01:12,870 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-06-12 18:01:12,871 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-06-12 18:01:12,871 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-06-12 18:01:12,871 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-06-12 18:01:12,872 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,873 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/CHC_inc-dec-eq0-locked.bpl_UID5986125054003542939.smt2 [2023-06-12 18:01:12,906 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-06-12 18:01:12,906 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-06-12 18:01:12,906 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-06-12 18:01:12,907 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-06-12 18:01:12,908 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,940 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12 Unit [2023-06-12 18:01:12,940 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-06-12 18:01:12,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 18:01:12,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 18:01:12,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 18:01:12,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 18:01:12,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 18:01:12,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 18:01:12,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 18:01:12,982 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (1/1) ... [2023-06-12 18:01:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 18:01:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 18:01:13,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 18:01:13,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-06-12 18:01:13,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-06-12 18:01:13,008 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-06-12 18:01:13,008 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-06-12 18:01:13,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-06-12 18:01:13,008 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-06-12 18:01:13,008 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-06-12 18:01:13,023 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 18:01:13,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 18:01:13,495 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 18:01:13,499 INFO L294 CfgBuilder]: Using library mode [2023-06-12 18:01:13,499 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 18:01:13,500 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:01:13 BoogieIcfgContainer [2023-06-12 18:01:13,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 18:01:13,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-06-12 18:01:13,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-06-12 18:01:13,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-06-12 18:01:13,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:01:12" (1/5) ... [2023-06-12 18:01:13,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3248d025 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 06:01:13, skipping insertion in model container [2023-06-12 18:01:13,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:01:12" (2/5) ... [2023-06-12 18:01:13,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3248d025 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 06:01:13, skipping insertion in model container [2023-06-12 18:01:13,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:01:12" (3/5) ... [2023-06-12 18:01:13,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3248d025 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 12.06 06:01:13, skipping insertion in model container [2023-06-12 18:01:13,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:01:12" (4/5) ... [2023-06-12 18:01:13,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3248d025 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 06:01:13, skipping insertion in model container [2023-06-12 18:01:13,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:01:13" (5/5) ... [2023-06-12 18:01:13,510 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-06-12 18:01:13,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-06-12 18:01:13,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-06-12 18:01:13,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-06-12 18:01:13,573 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;@693d8474, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-06-12 18:01:13,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-06-12 18:01:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-06-12 18:01:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-06-12 18:01:13,596 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:13,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:13,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:13,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash 302690729, now seen corresponding path program 1 times [2023-06-12 18:01:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:13,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953869541] [2023-06-12 18:01:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:13,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:13,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:01:13,735 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953869541] [2023-06-12 18:01:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953869541] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174562145] [2023-06-12 18:01:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:13,760 INFO L87 Difference]: Start difference. First operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:14,307 INFO L93 Difference]: Finished difference Result 410 states and 676 transitions. [2023-06-12 18:01:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-06-12 18:01:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:14,328 INFO L225 Difference]: With dead ends: 410 [2023-06-12 18:01:14,328 INFO L226 Difference]: Without dead ends: 408 [2023-06-12 18:01:14,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:14,331 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 561 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:14,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 466 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-06-12 18:01:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-06-12 18:01:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 260 states have (on average 1.476923076923077) internal successors, (384), 260 states have internal predecessors, (384), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 18:01:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 674 transitions. [2023-06-12 18:01:14,431 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 674 transitions. Word has length 8 [2023-06-12 18:01:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:14,432 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 674 transitions. [2023-06-12 18:01:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 674 transitions. [2023-06-12 18:01:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 18:01:14,445 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:14,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:14,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-06-12 18:01:14,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:14,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1251489235, now seen corresponding path program 1 times [2023-06-12 18:01:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941949998] [2023-06-12 18:01:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:14,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:14,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:01:14,480 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941949998] [2023-06-12 18:01:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941949998] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:14,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:14,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184060028] [2023-06-12 18:01:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:14,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:14,482 INFO L87 Difference]: Start difference. First operand 408 states and 674 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:15,067 INFO L93 Difference]: Finished difference Result 674 states and 1180 transitions. [2023-06-12 18:01:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 18:01:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:15,087 INFO L225 Difference]: With dead ends: 674 [2023-06-12 18:01:15,087 INFO L226 Difference]: Without dead ends: 674 [2023-06-12 18:01:15,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:15,089 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 61 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:15,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1030 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-06-12 18:01:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 458. [2023-06-12 18:01:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 310 states have (on average 1.7096774193548387) internal successors, (530), 310 states have internal predecessors, (530), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 18:01:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 820 transitions. [2023-06-12 18:01:15,162 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 820 transitions. Word has length 10 [2023-06-12 18:01:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:15,163 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 820 transitions. [2023-06-12 18:01:15,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 820 transitions. [2023-06-12 18:01:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 18:01:15,171 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:15,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:15,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-06-12 18:01:15,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:15,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1878231119, now seen corresponding path program 1 times [2023-06-12 18:01:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097526031] [2023-06-12 18:01:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:15,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:15,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:01:15,207 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097526031] [2023-06-12 18:01:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097526031] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:15,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:15,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669017642] [2023-06-12 18:01:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:15,208 INFO L87 Difference]: Start difference. First operand 458 states and 820 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:15,680 INFO L93 Difference]: Finished difference Result 772 states and 1374 transitions. [2023-06-12 18:01:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 18:01:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:15,702 INFO L225 Difference]: With dead ends: 772 [2023-06-12 18:01:15,702 INFO L226 Difference]: Without dead ends: 772 [2023-06-12 18:01:15,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:15,703 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 85 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:15,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1090 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-06-12 18:01:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 700. [2023-06-12 18:01:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 456 states have (on average 1.6929824561403508) internal successors, (772), 456 states have internal predecessors, (772), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-06-12 18:01:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1254 transitions. [2023-06-12 18:01:15,782 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1254 transitions. Word has length 10 [2023-06-12 18:01:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:15,782 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1254 transitions. [2023-06-12 18:01:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1254 transitions. [2023-06-12 18:01:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 18:01:15,869 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:15,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-06-12 18:01:15,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:15,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2019889692, now seen corresponding path program 1 times [2023-06-12 18:01:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648323239] [2023-06-12 18:01:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:15,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:15,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:01:15,914 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648323239] [2023-06-12 18:01:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648323239] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:15,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765996297] [2023-06-12 18:01:15,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:15,917 INFO L87 Difference]: Start difference. First operand 700 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:16,434 INFO L93 Difference]: Finished difference Result 1112 states and 2080 transitions. [2023-06-12 18:01:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:16,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 18:01:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:16,475 INFO L225 Difference]: With dead ends: 1112 [2023-06-12 18:01:16,475 INFO L226 Difference]: Without dead ends: 1112 [2023-06-12 18:01:16,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:16,476 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 63 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:16,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1028 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-06-12 18:01:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 752. [2023-06-12 18:01:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 508 states have (on average 1.9645669291338583) internal successors, (998), 508 states have internal predecessors, (998), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-06-12 18:01:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1480 transitions. [2023-06-12 18:01:16,559 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1480 transitions. Word has length 13 [2023-06-12 18:01:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:16,560 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1480 transitions. [2023-06-12 18:01:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1480 transitions. [2023-06-12 18:01:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 18:01:16,587 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:16,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:16,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-06-12 18:01:16,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:16,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1021372106, now seen corresponding path program 1 times [2023-06-12 18:01:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:16,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740826096] [2023-06-12 18:01:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:16,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:16,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:01:16,622 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740826096] [2023-06-12 18:01:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [740826096] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:16,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273985360] [2023-06-12 18:01:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:16,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:16,623 INFO L87 Difference]: Start difference. First operand 752 states and 1480 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:17,074 INFO L93 Difference]: Finished difference Result 1070 states and 2194 transitions. [2023-06-12 18:01:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 18:01:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:17,113 INFO L225 Difference]: With dead ends: 1070 [2023-06-12 18:01:17,113 INFO L226 Difference]: Without dead ends: 1070 [2023-06-12 18:01:17,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:17,115 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 87 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:17,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1088 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2023-06-12 18:01:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 998. [2023-06-12 18:01:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 658 states have (on average 2.127659574468085) internal successors, (1400), 658 states have internal predecessors, (1400), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-06-12 18:01:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2074 transitions. [2023-06-12 18:01:17,235 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2074 transitions. Word has length 13 [2023-06-12 18:01:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:17,235 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 2074 transitions. [2023-06-12 18:01:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2074 transitions. [2023-06-12 18:01:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 18:01:17,294 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:17,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:17,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-06-12 18:01:17,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:17,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2013488785, now seen corresponding path program 1 times [2023-06-12 18:01:17,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074164329] [2023-06-12 18:01:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:17,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:17,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 18:01:17,340 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074164329] [2023-06-12 18:01:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074164329] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:17,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489031105] [2023-06-12 18:01:17,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:17,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:17,341 INFO L87 Difference]: Start difference. First operand 998 states and 2074 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:17,895 INFO L93 Difference]: Finished difference Result 1556 states and 3226 transitions. [2023-06-12 18:01:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 18:01:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:17,977 INFO L225 Difference]: With dead ends: 1556 [2023-06-12 18:01:17,977 INFO L226 Difference]: Without dead ends: 1556 [2023-06-12 18:01:17,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:17,978 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 65 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:17,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1026 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-06-12 18:01:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1052. [2023-06-12 18:01:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 712 states have (on average 2.404494382022472) internal successors, (1712), 712 states have internal predecessors, (1712), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-06-12 18:01:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2386 transitions. [2023-06-12 18:01:18,147 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2386 transitions. Word has length 16 [2023-06-12 18:01:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:18,147 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 2386 transitions. [2023-06-12 18:01:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2386 transitions. [2023-06-12 18:01:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 18:01:18,208 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:18,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:18,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-06-12 18:01:18,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:18,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash 719065799, now seen corresponding path program 1 times [2023-06-12 18:01:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:18,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486316532] [2023-06-12 18:01:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:18,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:18,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 18:01:18,228 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486316532] [2023-06-12 18:01:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [486316532] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406348630] [2023-06-12 18:01:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:18,230 INFO L87 Difference]: Start difference. First operand 1052 states and 2386 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:18,777 INFO L93 Difference]: Finished difference Result 1372 states and 3190 transitions. [2023-06-12 18:01:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 18:01:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:18,843 INFO L225 Difference]: With dead ends: 1372 [2023-06-12 18:01:18,843 INFO L226 Difference]: Without dead ends: 1372 [2023-06-12 18:01:18,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:18,844 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 89 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:18,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1086 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2023-06-12 18:01:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1300. [2023-06-12 18:01:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 864 states have (on average 2.550925925925926) internal successors, (2204), 864 states have internal predecessors, (2204), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-06-12 18:01:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3070 transitions. [2023-06-12 18:01:18,975 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3070 transitions. Word has length 16 [2023-06-12 18:01:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:18,975 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 3070 transitions. [2023-06-12 18:01:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3070 transitions. [2023-06-12 18:01:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 18:01:19,097 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:19,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-06-12 18:01:19,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:19,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1677503500, now seen corresponding path program 1 times [2023-06-12 18:01:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894510669] [2023-06-12 18:01:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:19,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:19,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 18:01:19,126 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894510669] [2023-06-12 18:01:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [894510669] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:19,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735195044] [2023-06-12 18:01:19,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:19,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:19,127 INFO L87 Difference]: Start difference. First operand 1300 states and 3070 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:19,717 INFO L93 Difference]: Finished difference Result 2004 states and 4554 transitions. [2023-06-12 18:01:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 18:01:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:19,850 INFO L225 Difference]: With dead ends: 2004 [2023-06-12 18:01:19,851 INFO L226 Difference]: Without dead ends: 2004 [2023-06-12 18:01:19,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:19,851 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 67 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:19,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1024 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2023-06-12 18:01:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1356. [2023-06-12 18:01:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 920 states have (on average 2.8347826086956522) internal successors, (2608), 920 states have internal predecessors, (2608), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-06-12 18:01:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3474 transitions. [2023-06-12 18:01:20,054 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3474 transitions. Word has length 19 [2023-06-12 18:01:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:20,054 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 3474 transitions. [2023-06-12 18:01:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3474 transitions. [2023-06-12 18:01:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 18:01:20,255 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:20,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:20,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-06-12 18:01:20,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:20,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash 327600528, now seen corresponding path program 1 times [2023-06-12 18:01:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:20,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322517163] [2023-06-12 18:01:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:20,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:20,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 18:01:20,292 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322517163] [2023-06-12 18:01:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [322517163] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:20,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:20,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894604417] [2023-06-12 18:01:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:20,293 INFO L87 Difference]: Start difference. First operand 1356 states and 3474 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:20,819 INFO L93 Difference]: Finished difference Result 1678 states and 4374 transitions. [2023-06-12 18:01:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 18:01:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:20,909 INFO L225 Difference]: With dead ends: 1678 [2023-06-12 18:01:20,909 INFO L226 Difference]: Without dead ends: 1678 [2023-06-12 18:01:20,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:20,910 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 91 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:20,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1084 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:01:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2023-06-12 18:01:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1606. [2023-06-12 18:01:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1074 states have (on average 2.9757914338919926) internal successors, (3196), 1074 states have internal predecessors, (3196), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-06-12 18:01:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 4254 transitions. [2023-06-12 18:01:21,070 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 4254 transitions. Word has length 19 [2023-06-12 18:01:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:21,070 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 4254 transitions. [2023-06-12 18:01:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 4254 transitions. [2023-06-12 18:01:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 18:01:21,371 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:21,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-06-12 18:01:21,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:21,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1363825087, now seen corresponding path program 1 times [2023-06-12 18:01:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:21,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442462565] [2023-06-12 18:01:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:21,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:21,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:21,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 18:01:21,407 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442462565] [2023-06-12 18:01:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442462565] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:21,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697597601] [2023-06-12 18:01:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:21,408 INFO L87 Difference]: Start difference. First operand 1606 states and 4254 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:22,171 INFO L93 Difference]: Finished difference Result 2456 states and 6076 transitions. [2023-06-12 18:01:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 18:01:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:22,398 INFO L225 Difference]: With dead ends: 2456 [2023-06-12 18:01:22,398 INFO L226 Difference]: Without dead ends: 2456 [2023-06-12 18:01:22,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:22,399 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 69 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:22,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1022 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2023-06-12 18:01:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1664. [2023-06-12 18:01:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1132 states have (on average 3.26678445229682) internal successors, (3698), 1132 states have internal predecessors, (3698), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-06-12 18:01:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 4756 transitions. [2023-06-12 18:01:22,691 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 4756 transitions. Word has length 22 [2023-06-12 18:01:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:22,692 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 4756 transitions. [2023-06-12 18:01:22,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 4756 transitions. [2023-06-12 18:01:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 18:01:23,122 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:23,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-06-12 18:01:23,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:23,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 44839845, now seen corresponding path program 1 times [2023-06-12 18:01:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425461194] [2023-06-12 18:01:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:23,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:23,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 18:01:23,172 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425461194] [2023-06-12 18:01:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425461194] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:23,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414573442] [2023-06-12 18:01:23,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:23,173 INFO L87 Difference]: Start difference. First operand 1664 states and 4756 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:23,768 INFO L93 Difference]: Finished difference Result 1988 states and 5758 transitions. [2023-06-12 18:01:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:23,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 18:01:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:23,907 INFO L225 Difference]: With dead ends: 1988 [2023-06-12 18:01:23,908 INFO L226 Difference]: Without dead ends: 1988 [2023-06-12 18:01:23,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:23,908 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 93 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:23,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1082 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-06-12 18:01:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1916. [2023-06-12 18:01:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1288 states have (on average 3.406832298136646) internal successors, (4388), 1288 states have internal predecessors, (4388), 625 states have call successors, (625), 2 states have call predecessors, (625), 2 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2023-06-12 18:01:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 5638 transitions. [2023-06-12 18:01:24,124 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 5638 transitions. Word has length 22 [2023-06-12 18:01:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:24,124 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 5638 transitions. [2023-06-12 18:01:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 5638 transitions. [2023-06-12 18:01:24,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:24,884 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:24,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-06-12 18:01:24,885 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:24,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 711628727, now seen corresponding path program 1 times [2023-06-12 18:01:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:24,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494505063] [2023-06-12 18:01:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:24,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:24,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:25,001 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494505063] [2023-06-12 18:01:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [494505063] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:25,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346333987] [2023-06-12 18:01:25,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:25,007 INFO L87 Difference]: Start difference. First operand 1916 states and 5638 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:25,884 INFO L93 Difference]: Finished difference Result 2238 states and 6576 transitions. [2023-06-12 18:01:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:01:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:26,107 INFO L225 Difference]: With dead ends: 2238 [2023-06-12 18:01:26,107 INFO L226 Difference]: Without dead ends: 2238 [2023-06-12 18:01:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:26,108 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 107 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:26,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 881 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-06-12 18:01:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2023-06-12 18:01:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2166. [2023-06-12 18:01:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 1442 states have (on average 3.4771151178918167) internal successors, (5014), 1442 states have internal predecessors, (5014), 721 states have call successors, (721), 2 states have call predecessors, (721), 2 states have return successors, (721), 721 states have call predecessors, (721), 721 states have call successors, (721) [2023-06-12 18:01:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 6456 transitions. [2023-06-12 18:01:26,428 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 6456 transitions. Word has length 27 [2023-06-12 18:01:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:26,428 INFO L495 AbstractCegarLoop]: Abstraction has 2166 states and 6456 transitions. [2023-06-12 18:01:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 6456 transitions. [2023-06-12 18:01:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:27,240 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:27,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:27,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-06-12 18:01:27,241 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:27,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash -254665830, now seen corresponding path program 1 times [2023-06-12 18:01:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:27,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882992255] [2023-06-12 18:01:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:27,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:27,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:27,278 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882992255] [2023-06-12 18:01:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [882992255] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:27,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:27,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881201540] [2023-06-12 18:01:27,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:27,279 INFO L87 Difference]: Start difference. First operand 2166 states and 6456 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:28,150 INFO L93 Difference]: Finished difference Result 2488 states and 7414 transitions. [2023-06-12 18:01:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:01:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:28,376 INFO L225 Difference]: With dead ends: 2488 [2023-06-12 18:01:28,377 INFO L226 Difference]: Without dead ends: 2488 [2023-06-12 18:01:28,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:28,377 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 115 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:28,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 837 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2023-06-12 18:01:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2416. [2023-06-12 18:01:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1596 states have (on average 3.5463659147869673) internal successors, (5660), 1596 states have internal predecessors, (5660), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-06-12 18:01:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 7294 transitions. [2023-06-12 18:01:28,791 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 7294 transitions. Word has length 27 [2023-06-12 18:01:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:28,791 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 7294 transitions. [2023-06-12 18:01:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 7294 transitions. [2023-06-12 18:01:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:29,603 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:29,603 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-06-12 18:01:29,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:29,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1357728703, now seen corresponding path program 1 times [2023-06-12 18:01:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922777336] [2023-06-12 18:01:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:29,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:29,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:29,748 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:29,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922777336] [2023-06-12 18:01:29,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922777336] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:29,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:29,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954036841] [2023-06-12 18:01:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:29,749 INFO L87 Difference]: Start difference. First operand 2416 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:30,923 INFO L93 Difference]: Finished difference Result 3704 states and 10140 transitions. [2023-06-12 18:01:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:01:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:31,564 INFO L225 Difference]: With dead ends: 3704 [2023-06-12 18:01:31,565 INFO L226 Difference]: Without dead ends: 3704 [2023-06-12 18:01:31,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:31,565 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 84 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:31,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 853 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2023-06-12 18:01:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2480. [2023-06-12 18:01:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 1660 states have (on average 3.8951807228915665) internal successors, (6466), 1660 states have internal predecessors, (6466), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-06-12 18:01:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 8100 transitions. [2023-06-12 18:01:32,256 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 8100 transitions. Word has length 27 [2023-06-12 18:01:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:32,256 INFO L495 AbstractCegarLoop]: Abstraction has 2480 states and 8100 transitions. [2023-06-12 18:01:32,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 8100 transitions. [2023-06-12 18:01:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:33,236 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:33,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-06-12 18:01:33,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:33,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash 193031466, now seen corresponding path program 1 times [2023-06-12 18:01:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824994016] [2023-06-12 18:01:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:33,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:33,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:33,262 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:33,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824994016] [2023-06-12 18:01:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824994016] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:33,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282524007] [2023-06-12 18:01:33,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:33,263 INFO L87 Difference]: Start difference. First operand 2480 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:34,492 INFO L93 Difference]: Finished difference Result 3768 states and 11042 transitions. [2023-06-12 18:01:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:01:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:35,148 INFO L225 Difference]: With dead ends: 3768 [2023-06-12 18:01:35,149 INFO L226 Difference]: Without dead ends: 3768 [2023-06-12 18:01:35,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:35,151 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 114 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 733 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2023-06-12 18:01:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 2544. [2023-06-12 18:01:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 1724 states have (on average 4.273781902552204) internal successors, (7368), 1724 states have internal predecessors, (7368), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-06-12 18:01:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 9002 transitions. [2023-06-12 18:01:35,844 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 9002 transitions. Word has length 27 [2023-06-12 18:01:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:35,844 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 9002 transitions. [2023-06-12 18:01:35,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 9002 transitions. [2023-06-12 18:01:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:36,830 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:36,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:36,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-06-12 18:01:36,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:36,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -366590154, now seen corresponding path program 1 times [2023-06-12 18:01:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614732359] [2023-06-12 18:01:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:36,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-06-12 18:01:36,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:01:36,873 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614732359] [2023-06-12 18:01:36,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614732359] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:01:36,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:01:36,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-06-12 18:01:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389824636] [2023-06-12 18:01:36,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:01:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-06-12 18:01:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-06-12 18:01:36,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-06-12 18:01:36,874 INFO L87 Difference]: Start difference. First operand 2544 states and 9002 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) [2023-06-12 18:01:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:42,346 INFO L93 Difference]: Finished difference Result 7594 states and 28397 transitions. [2023-06-12 18:01:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:01:42,346 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 [2023-06-12 18:01:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:45,498 INFO L225 Difference]: With dead ends: 7594 [2023-06-12 18:01:45,498 INFO L226 Difference]: Without dead ends: 7593 [2023-06-12 18:01:45,499 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 [2023-06-12 18:01:45,499 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 835 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:45,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 1149 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-06-12 18:01:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2023-06-12 18:01:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6475. [2023-06-12 18:01:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 4374 states have (on average 4.217192501143119) internal successors, (18446), 4375 states have internal predecessors, (18446), 2097 states have call successors, (2097), 2 states have call predecessors, (2097), 3 states have return successors, (4133), 2097 states have call predecessors, (4133), 2097 states have call successors, (4133) [2023-06-12 18:01:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 24676 transitions. [2023-06-12 18:01:49,526 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 24676 transitions. Word has length 27 [2023-06-12 18:01:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:49,527 INFO L495 AbstractCegarLoop]: Abstraction has 6475 states and 24676 transitions. [2023-06-12 18:01:49,527 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) [2023-06-12 18:01:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 24676 transitions. [2023-06-12 18:01:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:01:51,583 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:51,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-06-12 18:01:51,584 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:51,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1092582821, now seen corresponding path program 1 times [2023-06-12 18:01:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376571218] [2023-06-12 18:01:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:51,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:51,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:51,625 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376571218] [2023-06-12 18:01:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [376571218] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:51,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:51,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869161557] [2023-06-12 18:01:51,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:51,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:51,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:51,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:51,627 INFO L87 Difference]: Start difference. First operand 6475 states and 24676 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:55,237 INFO L93 Difference]: Finished difference Result 7398 states and 28455 transitions. [2023-06-12 18:01:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:55,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:01:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:58,168 INFO L225 Difference]: With dead ends: 7398 [2023-06-12 18:01:58,168 INFO L226 Difference]: Without dead ends: 7398 [2023-06-12 18:01:58,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:58,169 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 123 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:58,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 793 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:01:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7398 states. [2023-06-12 18:02:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7398 to 7194. [2023-06-12 18:02:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 4821 states have (on average 4.344534328977391) internal successors, (20945), 4822 states have internal predecessors, (20945), 2369 states have call successors, (2369), 2 states have call predecessors, (2369), 3 states have return successors, (4669), 2369 states have call predecessors, (4669), 2369 states have call successors, (4669) [2023-06-12 18:02:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 27983 transitions. [2023-06-12 18:02:02,730 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 27983 transitions. Word has length 27 [2023-06-12 18:02:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:02:02,731 INFO L495 AbstractCegarLoop]: Abstraction has 7194 states and 27983 transitions. [2023-06-12 18:02:02,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:02:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 27983 transitions. [2023-06-12 18:02:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:02:04,662 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:02:04,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:02:04,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-06-12 18:02:04,663 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:02:04,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:02:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash -676917158, now seen corresponding path program 1 times [2023-06-12 18:02:04,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:02:04,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039488176] [2023-06-12 18:02:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:02:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:02:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:02:04,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:02:04,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:02:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:02:04,691 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:02:04,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039488176] [2023-06-12 18:02:04,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039488176] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:02:04,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:02:04,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:02:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419610347] [2023-06-12 18:02:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:02:04,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:02:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:02:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:02:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:02:04,692 INFO L87 Difference]: Start difference. First operand 7194 states and 27983 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:02:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:02:09,282 INFO L93 Difference]: Finished difference Result 8117 states and 31801 transitions. [2023-06-12 18:02:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:02:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:02:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:13,712 INFO L225 Difference]: With dead ends: 8117 [2023-06-12 18:02:13,713 INFO L226 Difference]: Without dead ends: 8117 [2023-06-12 18:02:13,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:02:13,713 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 127 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:02:13,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 771 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:02:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2023-06-12 18:02:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7913. [2023-06-12 18:02:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 5268 states have (on average 4.457668944570995) internal successors, (23483), 5269 states have internal predecessors, (23483), 2641 states have call successors, (2641), 2 states have call predecessors, (2641), 3 states have return successors, (5205), 2641 states have call predecessors, (5205), 2641 states have call successors, (5205) [2023-06-12 18:02:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 31329 transitions. [2023-06-12 18:02:18,960 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 31329 transitions. Word has length 27 [2023-06-12 18:02:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:02:18,960 INFO L495 AbstractCegarLoop]: Abstraction has 7913 states and 31329 transitions. [2023-06-12 18:02:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:02:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 31329 transitions. [2023-06-12 18:02:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 18:02:21,005 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:02:21,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:02:21,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-06-12 18:02:21,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:02:21,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:02:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1848634210, now seen corresponding path program 1 times [2023-06-12 18:02:21,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:02:21,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060639160] [2023-06-12 18:02:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:02:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:02:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:02:21,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:02:21,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:02:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 18:02:21,030 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:02:21,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060639160] [2023-06-12 18:02:21,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060639160] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:02:21,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:02:21,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:02:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379442400] [2023-06-12 18:02:21,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:02:21,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:02:21,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:02:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:02:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:02:21,031 INFO L87 Difference]: Start difference. First operand 7913 states and 31329 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) [2023-06-12 18:02:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:02:30,665 INFO L93 Difference]: Finished difference Result 12064 states and 43327 transitions. [2023-06-12 18:02:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:02:30,665 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 [2023-06-12 18:02:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:39,927 INFO L225 Difference]: With dead ends: 12064 [2023-06-12 18:02:39,927 INFO L226 Difference]: Without dead ends: 12064 [2023-06-12 18:02:39,928 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 [2023-06-12 18:02:39,928 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 72 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 18:02:39,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 527 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 18:02:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12064 states. [2023-06-12 18:02:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12064 to 7913. [2023-06-12 18:02:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 5268 states have (on average 4.457668944570995) internal successors, (23483), 5269 states have internal predecessors, (23483), 2641 states have call successors, (2641), 2 states have call predecessors, (2641), 3 states have return successors, (5205), 2641 states have call predecessors, (5205), 2641 states have call successors, (5205) [2023-06-12 18:02:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 31329 transitions. [2023-06-12 18:02:48,168 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 31329 transitions. Word has length 25 [2023-06-12 18:02:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:02:48,168 INFO L495 AbstractCegarLoop]: Abstraction has 7913 states and 31329 transitions. [2023-06-12 18:02:48,169 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) [2023-06-12 18:02:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 31329 transitions. [2023-06-12 18:02:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 18:02:50,705 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:02:50,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:02:50,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-06-12 18:02:50,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:02:50,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:02:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash -976324843, now seen corresponding path program 1 times [2023-06-12 18:02:50,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:02:50,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786199569] [2023-06-12 18:02:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:02:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:02:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:02:50,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:02:50,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:02:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 18:02:50,752 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:02:50,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786199569] [2023-06-12 18:02:50,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [786199569] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:02:50,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:02:50,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:02:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498023750] [2023-06-12 18:02:50,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:02:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:02:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:02:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:02:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:02:50,753 INFO L87 Difference]: Start difference. First operand 7913 states and 31329 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) [2023-06-12 18:02:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:02:55,565 INFO L93 Difference]: Finished difference Result 8840 states and 35085 transitions. [2023-06-12 18:02:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:02:55,566 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 [2023-06-12 18:02:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:59,781 INFO L225 Difference]: With dead ends: 8840 [2023-06-12 18:02:59,782 INFO L226 Difference]: Without dead ends: 8840 [2023-06-12 18:02:59,782 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 [2023-06-12 18:02:59,782 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 95 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:02:59,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 822 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:02:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8840 states. [2023-06-12 18:03:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8840 to 8636. [2023-06-12 18:03:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 5719 states have (on average 4.539080258786501) internal successors, (25959), 5720 states have internal predecessors, (25959), 2913 states have call successors, (2913), 2 states have call predecessors, (2913), 3 states have return successors, (5741), 2913 states have call predecessors, (5741), 2913 states have call successors, (5741) [2023-06-12 18:03:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 34613 transitions. [2023-06-12 18:03:05,781 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 34613 transitions. Word has length 25 [2023-06-12 18:03:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:05,782 INFO L495 AbstractCegarLoop]: Abstraction has 8636 states and 34613 transitions. [2023-06-12 18:03:05,782 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) [2023-06-12 18:03:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 34613 transitions. [2023-06-12 18:03:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:03:10,860 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:10,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:10,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-06-12 18:03:10,860 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:10,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1071734398, now seen corresponding path program 1 times [2023-06-12 18:03:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612043424] [2023-06-12 18:03:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:10,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:10,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 18:03:10,879 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612043424] [2023-06-12 18:03:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [612043424] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:10,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006356576] [2023-06-12 18:03:10,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:10,881 INFO L87 Difference]: Start difference. First operand 8636 states and 34613 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-06-12 18:03:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:16,466 INFO L93 Difference]: Finished difference Result 9563 states and 38455 transitions. [2023-06-12 18:03:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:16,466 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-06-12 18:03:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:21,760 INFO L225 Difference]: With dead ends: 9563 [2023-06-12 18:03:21,760 INFO L226 Difference]: Without dead ends: 9563 [2023-06-12 18:03:21,760 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 [2023-06-12 18:03:21,761 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 99 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1021 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:03:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2023-06-12 18:03:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9359. [2023-06-12 18:03:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9359 states, 6170 states have (on average 4.622528363047001) internal successors, (28521), 6171 states have internal predecessors, (28521), 3185 states have call successors, (3185), 2 states have call predecessors, (3185), 3 states have return successors, (6277), 3185 states have call predecessors, (6277), 3185 states have call successors, (6277) [2023-06-12 18:03:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9359 states to 9359 states and 37983 transitions. [2023-06-12 18:03:30,759 INFO L78 Accepts]: Start accepts. Automaton has 9359 states and 37983 transitions. Word has length 30 [2023-06-12 18:03:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:30,775 INFO L495 AbstractCegarLoop]: Abstraction has 9359 states and 37983 transitions. [2023-06-12 18:03:30,775 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-06-12 18:03:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9359 states and 37983 transitions. [2023-06-12 18:03:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:03:37,212 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:37,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:37,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-06-12 18:03:37,212 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:37,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 328322903, now seen corresponding path program 1 times [2023-06-12 18:03:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:37,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476786026] [2023-06-12 18:03:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:37,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:37,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:03:37,233 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476786026] [2023-06-12 18:03:37,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476786026] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328677935] [2023-06-12 18:03:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:37,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:37,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:37,234 INFO L87 Difference]: Start difference. First operand 9359 states and 37983 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) [2023-06-12 18:03:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:45,662 INFO L93 Difference]: Finished difference Result 10895 states and 43325 transitions. [2023-06-12 18:03:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:45,662 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 [2023-06-12 18:03:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:52,355 INFO L225 Difference]: With dead ends: 10895 [2023-06-12 18:03:52,355 INFO L226 Difference]: Without dead ends: 10895 [2023-06-12 18:03:52,356 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 [2023-06-12 18:03:52,356 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:52,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 752 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:03:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2023-06-12 18:03:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10691. [2023-06-12 18:03:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10691 states, 6998 states have (on average 4.557730780222921) internal successors, (31895), 6999 states have internal predecessors, (31895), 3689 states have call successors, (3689), 2 states have call predecessors, (3689), 3 states have return successors, (7269), 3689 states have call predecessors, (7269), 3689 states have call successors, (7269) [2023-06-12 18:04:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10691 states to 10691 states and 42853 transitions. [2023-06-12 18:04:02,407 INFO L78 Accepts]: Start accepts. Automaton has 10691 states and 42853 transitions. Word has length 30 [2023-06-12 18:04:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:04:02,407 INFO L495 AbstractCegarLoop]: Abstraction has 10691 states and 42853 transitions. [2023-06-12 18:04:02,407 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) [2023-06-12 18:04:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10691 states and 42853 transitions. [2023-06-12 18:04:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:04:10,106 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:04:10,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:04:10,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-06-12 18:04:10,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:04:10,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:04:10,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1551902749, now seen corresponding path program 1 times [2023-06-12 18:04:10,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:04:10,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924680090] [2023-06-12 18:04:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:04:10,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:04:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:04:10,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:04:10,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:04:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 18:04:10,128 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:04:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924680090] [2023-06-12 18:04:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924680090] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:04:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:04:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:04:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975853830] [2023-06-12 18:04:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:04:10,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:04:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:04:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:04:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:04:10,129 INFO L87 Difference]: Start difference. First operand 10691 states and 42853 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-06-12 18:04:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:04:18,720 INFO L93 Difference]: Finished difference Result 11618 states and 46781 transitions. [2023-06-12 18:04:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:04:18,720 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-06-12 18:04:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:04:25,945 INFO L225 Difference]: With dead ends: 11618 [2023-06-12 18:04:25,946 INFO L226 Difference]: Without dead ends: 11618 [2023-06-12 18:04:25,946 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 [2023-06-12 18:04:25,946 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 103 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:04:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 984 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:04:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11618 states. [2023-06-12 18:04:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11618 to 11414. [2023-06-12 18:04:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 7449 states have (on average 4.637266747214391) internal successors, (34543), 7450 states have internal predecessors, (34543), 3961 states have call successors, (3961), 2 states have call predecessors, (3961), 3 states have return successors, (7805), 3961 states have call predecessors, (7805), 3961 states have call successors, (7805) [2023-06-12 18:04:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 46309 transitions. [2023-06-12 18:04:39,195 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 46309 transitions. Word has length 30 [2023-06-12 18:04:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:04:39,196 INFO L495 AbstractCegarLoop]: Abstraction has 11414 states and 46309 transitions. [2023-06-12 18:04:39,196 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-06-12 18:04:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 46309 transitions.