/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/notify-listeners/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/notify-listeners/notify-listeners.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:51:08,350 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:51:08,409 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/notify-listeners/ThreadModularVerifier.Settings.epf [2023-07-03 22:51:08,416 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:51:08,418 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:51:08,418 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:51:08,418 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:51:08,418 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:51:08,419 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:51:08,422 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-07-03 22:51:08,423 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-07-03 22:51:08,423 INFO L137 SettingsManager]: * Preference order used for reduction=LOCKSTEP [2023-07-03 22:51:08,423 INFO L137 SettingsManager]: * Single-instance threads=notifier [2023-07-03 22:51:08,424 INFO L137 SettingsManager]: * Assume program has a precondition=false [2023-07-03 22:51:08,424 INFO L137 SettingsManager]: * Conditional Independence=PRECOMPUTED_CONDITIONS [2023-07-03 22:51:08,424 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:51:08,425 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:51:08,425 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:51:08,425 INFO L137 SettingsManager]: * File name=CHC_conditional WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:51:08,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:51:08,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:51:08,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:51:08,608 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:51:08,609 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:51:08,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/notify-listeners/notify-listeners.bpl [2023-07-03 22:51:08,610 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/notify-listeners/notify-listeners.bpl' [2023-07-03 22:51:08,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:51:08,628 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:51:08,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:51:08,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:51:08,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:51:08,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:51:08,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:51:08,653 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:51:08,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:51:08,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:08,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:51:08,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:51:08,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:51:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-07-03 22:51:08,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure notifier given in one single declaration [2023-07-03 22:51:08,705 INFO L130 BoogieDeclarations]: Found specification of procedure notifier [2023-07-03 22:51:08,705 INFO L138 BoogieDeclarations]: Found implementation of procedure notifier [2023-07-03 22:51:08,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:51:08,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:51:08,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:51:08,746 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:51:08,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:51:08,800 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:51:08,804 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:51:08,804 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-07-03 22:51:08,805 INFO L201 PluginConnector]: Adding new model notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:08 BoogieIcfgContainer [2023-07-03 22:51:08,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:51:08,806 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:51:08,806 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:51:08,806 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:51:08,808 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:08" (1/1) ... [2023-07-03 22:51:09,004 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume true;' is: true [2023-07-03 22:51:09,006 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,009 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'prev := 0;' is: true [2023-07-03 22:51:09,011 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'idx := current;' is: true [2023-07-03 22:51:09,013 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,016 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,019 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,022 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:09,023 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,024 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'prev := 0;' is: true [2023-07-03 22:51:09,026 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'idx := current;' is: true [2023-07-03 22:51:09,027 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,029 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,031 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,034 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'assume true;' is: true [2023-07-03 22:51:09,035 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,037 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'prev := 0;' is: true [2023-07-03 22:51:09,039 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'idx := current;' is: true [2023-07-03 22:51:09,041 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,042 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,044 INFO L180 IndependenceChecker]: instantiated independence condition for 'havoc data;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,047 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'assume true;' is: true [2023-07-03 22:51:09,049 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,055 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'prev := 0;' is: true [2023-07-03 22:51:09,057 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'idx := current;' is: true [2023-07-03 22:51:09,059 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,065 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,067 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume data > prev;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,070 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'assume true;' is: true [2023-07-03 22:51:09,072 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,073 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'prev := 0;' is: true [2023-07-03 22:51:09,075 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'idx := current;' is: true [2023-07-03 22:51:09,077 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,079 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,080 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := data;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,098 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'assume true;' is: true [2023-07-03 22:51:09,099 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'assume idx < current;' is: true [2023-07-03 22:51:09,104 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'prev := 0;' is: true [2023-07-03 22:51:09,106 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'idx := current;' is: true [2023-07-03 22:51:09,107 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,116 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-07-03 22:51:09,199 INFO L180 IndependenceChecker]: instantiated independence condition for 'notifications := notifications[current := data];' and 'msg := notifications[idx];' is: (not (= ULTIMATE.start_~~right~~idx current)) [2023-07-03 22:51:09,203 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'assume true;' is: true [2023-07-03 22:51:09,225 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'assume idx < current;' is: (< ULTIMATE.start_~~right~~idx current) [2023-07-03 22:51:09,226 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'prev := 0;' is: true [2023-07-03 22:51:09,238 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'idx := current;' is: false [2023-07-03 22:51:09,239 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,241 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,242 INFO L180 IndependenceChecker]: instantiated independence condition for 'current := current + 1;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,245 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'prev := data;' is: true [2023-07-03 22:51:09,246 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,247 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'assume true;' is: true [2023-07-03 22:51:09,248 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'havoc data;' is: true [2023-07-03 22:51:09,249 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'prev := 0;' is: true [2023-07-03 22:51:09,259 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'current := current + 1;' is: false [2023-07-03 22:51:09,261 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,262 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'assume true;' is: true [2023-07-03 22:51:09,263 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,264 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'prev := 0;' is: true [2023-07-03 22:51:09,265 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'idx := current;' is: true [2023-07-03 22:51:09,266 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,267 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,268 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := current;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,280 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'prev := data;' is: true [2023-07-03 22:51:09,282 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,284 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume true;' is: true [2023-07-03 22:51:09,286 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'havoc data;' is: true [2023-07-03 22:51:09,287 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'prev := 0;' is: true [2023-07-03 22:51:09,288 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'current := current + 1;' is: true [2023-07-03 22:51:09,290 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,291 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume true;' is: true [2023-07-03 22:51:09,292 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,294 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'prev := 0;' is: true [2023-07-03 22:51:09,296 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'idx := current;' is: true [2023-07-03 22:51:09,297 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,298 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,300 INFO L180 IndependenceChecker]: instantiated independence condition for 'prev := 0;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,312 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'prev := data;' is: true [2023-07-03 22:51:09,313 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,314 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:09,315 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'havoc data;' is: true [2023-07-03 22:51:09,315 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'prev := 0;' is: true [2023-07-03 22:51:09,316 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'current := current + 1;' is: true [2023-07-03 22:51:09,317 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,318 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:51:09,319 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,321 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'prev := 0;' is: true [2023-07-03 22:51:09,322 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'idx := current;' is: true [2023-07-03 22:51:09,323 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,324 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,328 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,340 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'prev := data;' is: true [2023-07-03 22:51:09,342 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,342 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'assume true;' is: true [2023-07-03 22:51:09,343 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'havoc data;' is: true [2023-07-03 22:51:09,344 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'prev := 0;' is: true [2023-07-03 22:51:09,346 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'current := current + 1;' is: true [2023-07-03 22:51:09,347 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,349 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'assume true;' is: true [2023-07-03 22:51:09,350 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,351 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'prev := 0;' is: true [2023-07-03 22:51:09,352 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'idx := current;' is: true [2023-07-03 22:51:09,353 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,355 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,357 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume idx < current;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,363 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'prev := data;' is: true [2023-07-03 22:51:09,364 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'assume data > prev;' is: true [2023-07-03 22:51:09,365 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'assume true;' is: true [2023-07-03 22:51:09,366 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'havoc data;' is: true [2023-07-03 22:51:09,367 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'prev := 0;' is: true [2023-07-03 22:51:09,368 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'current := current + 1;' is: true [2023-07-03 22:51:09,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-07-03 22:51:09,412 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'notifications := notifications[current := data];' is: (not (= ULTIMATE.start_~~left~~idx current)) [2023-07-03 22:51:09,414 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'assume true;' is: true [2023-07-03 22:51:09,415 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'assume idx < current;' is: true [2023-07-03 22:51:09,416 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'prev := 0;' is: true [2023-07-03 22:51:09,418 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'idx := current;' is: true [2023-07-03 22:51:09,419 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,421 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,421 INFO L180 IndependenceChecker]: instantiated independence condition for 'msg := notifications[idx];' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,433 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'prev := data;' is: true [2023-07-03 22:51:09,437 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,440 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'assume true;' is: true [2023-07-03 22:51:09,445 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'havoc data;' is: true [2023-07-03 22:51:09,447 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'prev := 0;' is: true [2023-07-03 22:51:09,448 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'current := current + 1;' is: true [2023-07-03 22:51:09,450 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,452 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'assume true;' is: true [2023-07-03 22:51:09,454 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,456 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'prev := 0;' is: true [2023-07-03 22:51:09,457 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'idx := current;' is: true [2023-07-03 22:51:09,458 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,459 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,460 INFO L180 IndependenceChecker]: instantiated independence condition for 'idx := idx + 1;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,466 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'prev := data;' is: true [2023-07-03 22:51:09,466 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'assume data > prev;' is: true [2023-07-03 22:51:09,467 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'assume true;' is: true [2023-07-03 22:51:09,468 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'havoc data;' is: true [2023-07-03 22:51:09,468 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'prev := 0;' is: true [2023-07-03 22:51:09,469 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'current := current + 1;' is: true [2023-07-03 22:51:09,471 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'notifications := notifications[current := data];' is: true [2023-07-03 22:51:09,471 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'assume true;' is: true [2023-07-03 22:51:09,472 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'assume idx < current;' is: true [2023-07-03 22:51:09,475 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'prev := 0;' is: true [2023-07-03 22:51:09,476 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'idx := current;' is: true [2023-07-03 22:51:09,477 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'assume true;prev := msg;' is: true [2023-07-03 22:51:09,478 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'idx := idx + 1;' is: true [2023-07-03 22:51:09,479 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;prev := msg;' and 'msg := notifications[idx];' is: true [2023-07-03 22:51:09,525 INFO L201 PluginConnector]: Adding new model notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:09 HornClauseAST [2023-07-03 22:51:09,525 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:51:09,525 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:51:09,526 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:51:09,526 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:51:09,526 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,528 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/notify-listeners/CHC_conditional_notify-listeners.bpl_UID6128234193391383297.smt2 [2023-07-03 22:51:09,560 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:51:09,561 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:51:09,561 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:51:09,562 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:51:09,562 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,592 INFO L201 PluginConnector]: Adding new model notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09 Unit [2023-07-03 22:51:09,592 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:51:09,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:51:09,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:51:09,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:51:09,593 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,637 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:51:09,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:51:09,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:51:09,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:51:09,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (1/1) ... [2023-07-03 22:51:09,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:51:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:51:09,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:51:09,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-07-03 22:51:09,649 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:51:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:51:09,649 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:51:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:51:09,679 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:51:09,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:51:10,147 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:51:10,149 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:51:10,149 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:51:10,150 INFO L201 PluginConnector]: Adding new model notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:10 BoogieIcfgContainer [2023-07-03 22:51:10,150 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:51:10,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:51:10,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:51:10,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:51:10,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:51:08" (1/5) ... [2023-07-03 22:51:10,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc7e1b0 and model type notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:51:10, skipping insertion in model container [2023-07-03 22:51:10,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:08" (2/5) ... [2023-07-03 22:51:10,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc7e1b0 and model type notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:51:10, skipping insertion in model container [2023-07-03 22:51:10,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:51:09" (3/5) ... [2023-07-03 22:51:10,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc7e1b0 and model type notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:51:10, skipping insertion in model container [2023-07-03 22:51:10,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:51:09" (4/5) ... [2023-07-03 22:51:10,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc7e1b0 and model type notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:51:10, skipping insertion in model container [2023-07-03 22:51:10,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "notify-listeners.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:51:10" (5/5) ... [2023-07-03 22:51:10,161 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:51:10,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:51:10,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:51:10,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:51:10,240 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;@6d36e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:51:10,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:51:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 91 states have internal predecessors, (132), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-07-03 22:51:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:51:10,274 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:10,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:10,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:10,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 496673421, now seen corresponding path program 1 times [2023-07-03 22:51:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:10,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972452570] [2023-07-03 22:51:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:10,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:10,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:10,372 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972452570] [2023-07-03 22:51:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [972452570] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:10,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92931843] [2023-07-03 22:51:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:10,396 INFO L87 Difference]: Start difference. First operand has 130 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 91 states have internal predecessors, (132), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:10,727 INFO L93 Difference]: Finished difference Result 254 states and 406 transitions. [2023-07-03 22:51:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-07-03 22:51:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:10,739 INFO L225 Difference]: With dead ends: 254 [2023-07-03 22:51:10,739 INFO L226 Difference]: Without dead ends: 252 [2023-07-03 22:51:10,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:10,742 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 372 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:10,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 304 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-07-03 22:51:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-07-03 22:51:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 176 states have (on average 1.4659090909090908) internal successors, (258), 176 states have internal predecessors, (258), 73 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-07-03 22:51:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 404 transitions. [2023-07-03 22:51:10,793 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 404 transitions. Word has length 8 [2023-07-03 22:51:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:10,795 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 404 transitions. [2023-07-03 22:51:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 404 transitions. [2023-07-03 22:51:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:51:10,803 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:10,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:10,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:51:10,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:10,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1772705937, now seen corresponding path program 1 times [2023-07-03 22:51:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263426935] [2023-07-03 22:51:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:10,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:10,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:10,852 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263426935] [2023-07-03 22:51:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [263426935] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:10,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210340211] [2023-07-03 22:51:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:10,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:10,855 INFO L87 Difference]: Start difference. First operand 252 states and 404 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:11,226 INFO L93 Difference]: Finished difference Result 442 states and 730 transitions. [2023-07-03 22:51:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:51:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:11,233 INFO L225 Difference]: With dead ends: 442 [2023-07-03 22:51:11,233 INFO L226 Difference]: Without dead ends: 442 [2023-07-03 22:51:11,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:11,234 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 61 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:11,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 620 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-07-03 22:51:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 406. [2023-07-03 22:51:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 282 states have (on average 1.5177304964539007) internal successors, (428), 282 states have internal predecessors, (428), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:51:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 670 transitions. [2023-07-03 22:51:11,295 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 670 transitions. Word has length 10 [2023-07-03 22:51:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:11,295 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 670 transitions. [2023-07-03 22:51:11,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 670 transitions. [2023-07-03 22:51:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:51:11,300 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:11,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:51:11,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:11,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1145964053, now seen corresponding path program 1 times [2023-07-03 22:51:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265200544] [2023-07-03 22:51:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:11,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:11,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:11,347 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265200544] [2023-07-03 22:51:11,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265200544] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:11,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:11,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806176650] [2023-07-03 22:51:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:11,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:11,349 INFO L87 Difference]: Start difference. First operand 406 states and 670 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:11,746 INFO L93 Difference]: Finished difference Result 674 states and 1174 transitions. [2023-07-03 22:51:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:51:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:11,763 INFO L225 Difference]: With dead ends: 674 [2023-07-03 22:51:11,763 INFO L226 Difference]: Without dead ends: 674 [2023-07-03 22:51:11,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:11,765 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 49 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:11,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 590 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:51:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-07-03 22:51:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 494. [2023-07-03 22:51:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 370 states have (on average 1.7081081081081082) internal successors, (632), 370 states have internal predecessors, (632), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:51:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 874 transitions. [2023-07-03 22:51:11,799 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 874 transitions. Word has length 10 [2023-07-03 22:51:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:11,799 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 874 transitions. [2023-07-03 22:51:11,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 874 transitions. [2023-07-03 22:51:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:51:11,810 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:11,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:11,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:51:11,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:11,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash -997630513, now seen corresponding path program 1 times [2023-07-03 22:51:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:11,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673685550] [2023-07-03 22:51:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:11,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:11,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:11,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:11,836 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:11,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673685550] [2023-07-03 22:51:11,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673685550] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:11,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792121479] [2023-07-03 22:51:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:11,838 INFO L87 Difference]: Start difference. First operand 494 states and 874 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:12,178 INFO L93 Difference]: Finished difference Result 714 states and 1286 transitions. [2023-07-03 22:51:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:51:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:12,193 INFO L225 Difference]: With dead ends: 714 [2023-07-03 22:51:12,193 INFO L226 Difference]: Without dead ends: 714 [2023-07-03 22:51:12,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:12,194 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 63 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:12,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 618 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-07-03 22:51:12,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 678. [2023-07-03 22:51:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 506 states have (on average 1.7549407114624507) internal successors, (888), 506 states have internal predecessors, (888), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:51:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1226 transitions. [2023-07-03 22:51:12,229 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1226 transitions. Word has length 13 [2023-07-03 22:51:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:12,229 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 1226 transitions. [2023-07-03 22:51:12,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1226 transitions. [2023-07-03 22:51:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:51:12,243 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:12,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:51:12,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:12,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2134486937, now seen corresponding path program 1 times [2023-07-03 22:51:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052407211] [2023-07-03 22:51:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:12,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:12,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:51:12,283 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052407211] [2023-07-03 22:51:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052407211] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:12,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:12,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767319891] [2023-07-03 22:51:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:12,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:12,284 INFO L87 Difference]: Start difference. First operand 678 states and 1226 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:12,699 INFO L93 Difference]: Finished difference Result 1048 states and 1940 transitions. [2023-07-03 22:51:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:51:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:12,731 INFO L225 Difference]: With dead ends: 1048 [2023-07-03 22:51:12,732 INFO L226 Difference]: Without dead ends: 1048 [2023-07-03 22:51:12,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:12,732 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 51 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 588 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2023-07-03 22:51:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 796. [2023-07-03 22:51:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 624 states have (on average 1.8942307692307692) internal successors, (1182), 624 states have internal predecessors, (1182), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:51:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1520 transitions. [2023-07-03 22:51:12,795 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1520 transitions. Word has length 13 [2023-07-03 22:51:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:12,796 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1520 transitions. [2023-07-03 22:51:12,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1520 transitions. [2023-07-03 22:51:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:51:12,826 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:12,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:12,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:51:12,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:12,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1023666511, now seen corresponding path program 1 times [2023-07-03 22:51:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:12,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639722356] [2023-07-03 22:51:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:12,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:12,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:12,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:51:12,854 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639722356] [2023-07-03 22:51:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639722356] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:12,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:12,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:12,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277412147] [2023-07-03 22:51:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:12,856 INFO L87 Difference]: Start difference. First operand 796 states and 1520 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:13,244 INFO L93 Difference]: Finished difference Result 1046 states and 2024 transitions. [2023-07-03 22:51:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:51:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:13,268 INFO L225 Difference]: With dead ends: 1046 [2023-07-03 22:51:13,268 INFO L226 Difference]: Without dead ends: 1046 [2023-07-03 22:51:13,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:13,269 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 65 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:13,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 616 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2023-07-03 22:51:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1010. [2023-07-03 22:51:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 790 states have (on average 1.9367088607594938) internal successors, (1530), 790 states have internal predecessors, (1530), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-07-03 22:51:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1964 transitions. [2023-07-03 22:51:13,323 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1964 transitions. Word has length 16 [2023-07-03 22:51:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:13,323 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1964 transitions. [2023-07-03 22:51:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1964 transitions. [2023-07-03 22:51:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:51:13,379 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:13,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:13,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:51:13,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:13,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash 492954901, now seen corresponding path program 1 times [2023-07-03 22:51:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:13,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544523729] [2023-07-03 22:51:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:13,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:13,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-07-03 22:51:13,422 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544523729] [2023-07-03 22:51:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [544523729] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:13,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:13,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220045260] [2023-07-03 22:51:13,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:13,424 INFO L87 Difference]: Start difference. First operand 1010 states and 1964 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:13,835 INFO L93 Difference]: Finished difference Result 1482 states and 2894 transitions. [2023-07-03 22:51:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:51:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:13,890 INFO L225 Difference]: With dead ends: 1482 [2023-07-03 22:51:13,891 INFO L226 Difference]: Without dead ends: 1482 [2023-07-03 22:51:13,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:13,892 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 53 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:13,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 586 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-07-03 22:51:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1158. [2023-07-03 22:51:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 938 states have (on average 2.046908315565032) internal successors, (1920), 938 states have internal predecessors, (1920), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-07-03 22:51:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2354 transitions. [2023-07-03 22:51:13,987 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2354 transitions. Word has length 16 [2023-07-03 22:51:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:13,987 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 2354 transitions. [2023-07-03 22:51:13,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2354 transitions. [2023-07-03 22:51:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:51:14,077 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:14,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:51:14,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:14,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:14,078 INFO L85 PathProgramCache]: Analyzing trace with hash -299536537, now seen corresponding path program 1 times [2023-07-03 22:51:14,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:14,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039562722] [2023-07-03 22:51:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:14,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:14,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:51:14,101 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:14,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039562722] [2023-07-03 22:51:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039562722] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:14,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847944347] [2023-07-03 22:51:14,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:14,103 INFO L87 Difference]: Start difference. First operand 1158 states and 2354 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:14,449 INFO L93 Difference]: Finished difference Result 1438 states and 2972 transitions. [2023-07-03 22:51:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-07-03 22:51:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:14,489 INFO L225 Difference]: With dead ends: 1438 [2023-07-03 22:51:14,489 INFO L226 Difference]: Without dead ends: 1438 [2023-07-03 22:51:14,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:14,489 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 69 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:14,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 612 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2023-07-03 22:51:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1402. [2023-07-03 22:51:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1134 states have (on average 2.1005291005291005) internal successors, (2382), 1134 states have internal predecessors, (2382), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-07-03 22:51:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2912 transitions. [2023-07-03 22:51:14,598 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2912 transitions. Word has length 19 [2023-07-03 22:51:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:14,598 INFO L495 AbstractCegarLoop]: Abstraction has 1402 states and 2912 transitions. [2023-07-03 22:51:14,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2912 transitions. [2023-07-03 22:51:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:51:14,697 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:14,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:14,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:51:14,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:14,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1396783571, now seen corresponding path program 1 times [2023-07-03 22:51:14,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:14,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442022098] [2023-07-03 22:51:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:14,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:14,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:51:14,722 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442022098] [2023-07-03 22:51:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [442022098] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:14,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928728561] [2023-07-03 22:51:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:14,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:14,723 INFO L87 Difference]: Start difference. First operand 1402 states and 2912 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:15,133 INFO L93 Difference]: Finished difference Result 1976 states and 4088 transitions. [2023-07-03 22:51:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-07-03 22:51:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:15,222 INFO L225 Difference]: With dead ends: 1976 [2023-07-03 22:51:15,222 INFO L226 Difference]: Without dead ends: 1976 [2023-07-03 22:51:15,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:15,223 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 57 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:15,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 582 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-07-03 22:51:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1580. [2023-07-03 22:51:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1312 states have (on average 2.2088414634146343) internal successors, (2898), 1312 states have internal predecessors, (2898), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-07-03 22:51:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3428 transitions. [2023-07-03 22:51:15,376 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3428 transitions. Word has length 19 [2023-07-03 22:51:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:15,376 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 3428 transitions. [2023-07-03 22:51:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3428 transitions. [2023-07-03 22:51:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:51:15,503 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:15,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:15,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:51:15,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:15,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -308906195, now seen corresponding path program 1 times [2023-07-03 22:51:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:15,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965323752] [2023-07-03 22:51:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:15,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:15,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:51:15,529 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:15,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965323752] [2023-07-03 22:51:15,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [965323752] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:15,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:15,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80588177] [2023-07-03 22:51:15,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:15,531 INFO L87 Difference]: Start difference. First operand 1580 states and 3428 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:15,893 INFO L93 Difference]: Finished difference Result 1890 states and 4158 transitions. [2023-07-03 22:51:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:51:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:15,956 INFO L225 Difference]: With dead ends: 1890 [2023-07-03 22:51:15,956 INFO L226 Difference]: Without dead ends: 1890 [2023-07-03 22:51:15,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:15,957 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 71 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:15,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 610 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2023-07-03 22:51:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1854. [2023-07-03 22:51:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1538 states have (on average 2.2574772431729517) internal successors, (3472), 1538 states have internal predecessors, (3472), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:51:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 4098 transitions. [2023-07-03 22:51:16,144 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 4098 transitions. Word has length 22 [2023-07-03 22:51:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:16,144 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 4098 transitions. [2023-07-03 22:51:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 4098 transitions. [2023-07-03 22:51:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:51:16,358 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:16,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:51:16,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:16,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash -606577055, now seen corresponding path program 1 times [2023-07-03 22:51:16,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:16,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958735677] [2023-07-03 22:51:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:16,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:16,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:51:16,387 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:16,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958735677] [2023-07-03 22:51:16,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [958735677] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:16,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:16,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:16,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418955547] [2023-07-03 22:51:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:16,389 INFO L87 Difference]: Start difference. First operand 1854 states and 4098 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:16,833 INFO L93 Difference]: Finished difference Result 2530 states and 5510 transitions. [2023-07-03 22:51:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:51:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:16,979 INFO L225 Difference]: With dead ends: 2530 [2023-07-03 22:51:16,979 INFO L226 Difference]: Without dead ends: 2530 [2023-07-03 22:51:16,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:16,980 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 59 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:16,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 580 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2023-07-03 22:51:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2062. [2023-07-03 22:51:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1746 states have (on average 2.350515463917526) internal successors, (4104), 1746 states have internal predecessors, (4104), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:51:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 4730 transitions. [2023-07-03 22:51:17,181 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 4730 transitions. Word has length 22 [2023-07-03 22:51:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:17,181 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 4730 transitions. [2023-07-03 22:51:17,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 4730 transitions. [2023-07-03 22:51:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:17,395 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:17,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:51:17,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:17,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1509158407, now seen corresponding path program 1 times [2023-07-03 22:51:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:17,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078522669] [2023-07-03 22:51:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:17,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:17,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:17,423 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:17,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078522669] [2023-07-03 22:51:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078522669] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:17,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:17,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120883328] [2023-07-03 22:51:17,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:17,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:17,424 INFO L87 Difference]: Start difference. First operand 2062 states and 4730 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:17,919 INFO L93 Difference]: Finished difference Result 2402 states and 5554 transitions. [2023-07-03 22:51:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:18,005 INFO L225 Difference]: With dead ends: 2402 [2023-07-03 22:51:18,005 INFO L226 Difference]: Without dead ends: 2402 [2023-07-03 22:51:18,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:18,006 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 73 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:18,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 518 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:51:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2023-07-03 22:51:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2062. [2023-07-03 22:51:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1746 states have (on average 2.350515463917526) internal successors, (4104), 1746 states have internal predecessors, (4104), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:51:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 4730 transitions. [2023-07-03 22:51:18,135 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 4730 transitions. Word has length 27 [2023-07-03 22:51:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:18,135 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 4730 transitions. [2023-07-03 22:51:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 4730 transitions. [2023-07-03 22:51:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:18,358 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:18,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:18,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:51:18,358 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:18,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1586070982, now seen corresponding path program 1 times [2023-07-03 22:51:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:18,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169590495] [2023-07-03 22:51:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:18,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:18,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:18,382 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169590495] [2023-07-03 22:51:18,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169590495] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:18,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:18,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:18,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642102426] [2023-07-03 22:51:18,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:18,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:18,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:18,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:18,383 INFO L87 Difference]: Start difference. First operand 2062 states and 4730 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:18,906 INFO L93 Difference]: Finished difference Result 2706 states and 6330 transitions. [2023-07-03 22:51:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:19,019 INFO L225 Difference]: With dead ends: 2706 [2023-07-03 22:51:19,019 INFO L226 Difference]: Without dead ends: 2706 [2023-07-03 22:51:19,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:19,019 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 77 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:19,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 496 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:51:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2023-07-03 22:51:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2062. [2023-07-03 22:51:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1746 states have (on average 2.350515463917526) internal successors, (4104), 1746 states have internal predecessors, (4104), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-07-03 22:51:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 4730 transitions. [2023-07-03 22:51:19,161 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 4730 transitions. Word has length 27 [2023-07-03 22:51:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:19,162 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 4730 transitions. [2023-07-03 22:51:19,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 4730 transitions. [2023-07-03 22:51:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:19,372 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:19,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:19,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:51:19,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:19,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1605533261, now seen corresponding path program 1 times [2023-07-03 22:51:19,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:19,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974113724] [2023-07-03 22:51:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:19,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:19,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:19,408 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:19,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974113724] [2023-07-03 22:51:19,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974113724] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:19,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:19,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:19,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267085076] [2023-07-03 22:51:19,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:19,409 INFO L87 Difference]: Start difference. First operand 2062 states and 4730 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:21,445 INFO L93 Difference]: Finished difference Result 3521 states and 8577 transitions. [2023-07-03 22:51:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-07-03 22:51:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:51:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:21,752 INFO L225 Difference]: With dead ends: 3521 [2023-07-03 22:51:21,752 INFO L226 Difference]: Without dead ends: 3520 [2023-07-03 22:51:21,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-07-03 22:51:21,753 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 482 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:21,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 496 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-07-03 22:51:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2023-07-03 22:51:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3260. [2023-07-03 22:51:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 2739 states have (on average 2.3680175246440305) internal successors, (6486), 2764 states have internal predecessors, (6486), 517 states have call successors, (517), 2 states have call predecessors, (517), 3 states have return successors, (979), 493 states have call predecessors, (979), 517 states have call successors, (979) [2023-07-03 22:51:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 7982 transitions. [2023-07-03 22:51:22,406 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 7982 transitions. Word has length 27 [2023-07-03 22:51:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:22,407 INFO L495 AbstractCegarLoop]: Abstraction has 3260 states and 7982 transitions. [2023-07-03 22:51:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 7982 transitions. [2023-07-03 22:51:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:51:22,651 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:22,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:51:22,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:22,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash 405341397, now seen corresponding path program 1 times [2023-07-03 22:51:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:22,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890507036] [2023-07-03 22:51:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:22,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:51:22,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:51:22,689 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:22,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890507036] [2023-07-03 22:51:22,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [890507036] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:22,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:22,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-07-03 22:51:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840997519] [2023-07-03 22:51:22,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:22,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-07-03 22:51:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-07-03 22:51:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:51:22,690 INFO L87 Difference]: Start difference. First operand 3260 states and 7982 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:23,593 INFO L93 Difference]: Finished difference Result 5246 states and 12926 transitions. [2023-07-03 22:51:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-07-03 22:51:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:51:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:24,256 INFO L225 Difference]: With dead ends: 5246 [2023-07-03 22:51:24,256 INFO L226 Difference]: Without dead ends: 5246 [2023-07-03 22:51:24,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:51:24,257 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 64 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:24,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 432 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5246 states. [2023-07-03 22:51:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5246 to 4172. [2023-07-03 22:51:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 3507 states have (on average 2.42087254063302) internal successors, (8490), 3532 states have internal predecessors, (8490), 661 states have call successors, (661), 2 states have call predecessors, (661), 3 states have return successors, (1267), 637 states have call predecessors, (1267), 661 states have call successors, (1267) [2023-07-03 22:51:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 10418 transitions. [2023-07-03 22:51:25,063 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 10418 transitions. Word has length 25 [2023-07-03 22:51:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 4172 states and 10418 transitions. [2023-07-03 22:51:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 10418 transitions. [2023-07-03 22:51:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:51:25,555 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:25,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:51:25,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:25,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1321766673, now seen corresponding path program 1 times [2023-07-03 22:51:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:25,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032386485] [2023-07-03 22:51:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:25,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:51:25,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:51:25,585 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032386485] [2023-07-03 22:51:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032386485] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:25,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:25,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-07-03 22:51:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389699171] [2023-07-03 22:51:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-07-03 22:51:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-07-03 22:51:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:51:25,586 INFO L87 Difference]: Start difference. First operand 4172 states and 10418 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:27,052 INFO L93 Difference]: Finished difference Result 6967 states and 17763 transitions. [2023-07-03 22:51:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-07-03 22:51:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:51:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:28,201 INFO L225 Difference]: With dead ends: 6967 [2023-07-03 22:51:28,201 INFO L226 Difference]: Without dead ends: 6967 [2023-07-03 22:51:28,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:51:28,202 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 52 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:28,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 420 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:51:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2023-07-03 22:51:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 5030. [2023-07-03 22:51:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 4365 states have (on average 2.540664375715922) internal successors, (11090), 4390 states have internal predecessors, (11090), 661 states have call successors, (661), 2 states have call predecessors, (661), 3 states have return successors, (1267), 637 states have call predecessors, (1267), 661 states have call successors, (1267) [2023-07-03 22:51:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 13018 transitions. [2023-07-03 22:51:29,472 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 13018 transitions. Word has length 25 [2023-07-03 22:51:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:29,472 INFO L495 AbstractCegarLoop]: Abstraction has 5030 states and 13018 transitions. [2023-07-03 22:51:29,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:51:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 13018 transitions. [2023-07-03 22:51:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:29,997 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:29,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:29,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:51:29,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:29,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1604907159, now seen corresponding path program 1 times [2023-07-03 22:51:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:29,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784833572] [2023-07-03 22:51:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:30,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:30,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:30,020 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784833572] [2023-07-03 22:51:30,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [784833572] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:30,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:30,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:30,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899980931] [2023-07-03 22:51:30,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:30,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:30,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:30,021 INFO L87 Difference]: Start difference. First operand 5030 states and 13018 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:31,546 INFO L93 Difference]: Finished difference Result 6425 states and 16550 transitions. [2023-07-03 22:51:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:32,826 INFO L225 Difference]: With dead ends: 6425 [2023-07-03 22:51:32,827 INFO L226 Difference]: Without dead ends: 6425 [2023-07-03 22:51:32,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:32,827 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 65 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:32,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 496 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:51:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6425 states. [2023-07-03 22:51:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6425 to 5030. [2023-07-03 22:51:33,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 4365 states have (on average 2.540664375715922) internal successors, (11090), 4390 states have internal predecessors, (11090), 661 states have call successors, (661), 2 states have call predecessors, (661), 3 states have return successors, (1267), 637 states have call predecessors, (1267), 661 states have call successors, (1267) [2023-07-03 22:51:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 13018 transitions. [2023-07-03 22:51:33,896 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 13018 transitions. Word has length 27 [2023-07-03 22:51:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:33,896 INFO L495 AbstractCegarLoop]: Abstraction has 5030 states and 13018 transitions. [2023-07-03 22:51:33,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 13018 transitions. [2023-07-03 22:51:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:34,491 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:34,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:51:34,492 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:34,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1211985687, now seen corresponding path program 1 times [2023-07-03 22:51:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:34,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691982004] [2023-07-03 22:51:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:34,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:34,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:34,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:34,514 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691982004] [2023-07-03 22:51:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [691982004] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:34,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:34,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20158645] [2023-07-03 22:51:34,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:34,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:34,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:34,515 INFO L87 Difference]: Start difference. First operand 5030 states and 13018 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:36,227 INFO L93 Difference]: Finished difference Result 6842 states and 17863 transitions. [2023-07-03 22:51:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:36,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:51:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:37,591 INFO L225 Difference]: With dead ends: 6842 [2023-07-03 22:51:37,591 INFO L226 Difference]: Without dead ends: 6842 [2023-07-03 22:51:37,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:37,592 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 70 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:37,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 476 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2023-07-03 22:51:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 5030. [2023-07-03 22:51:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 4365 states have (on average 2.540664375715922) internal successors, (11090), 4390 states have internal predecessors, (11090), 661 states have call successors, (661), 2 states have call predecessors, (661), 3 states have return successors, (1267), 637 states have call predecessors, (1267), 661 states have call successors, (1267) [2023-07-03 22:51:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 13018 transitions. [2023-07-03 22:51:38,686 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 13018 transitions. Word has length 27 [2023-07-03 22:51:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:38,686 INFO L495 AbstractCegarLoop]: Abstraction has 5030 states and 13018 transitions. [2023-07-03 22:51:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 13018 transitions. [2023-07-03 22:51:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:51:39,421 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:39,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-07-03 22:51:39,421 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:39,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1858085663, now seen corresponding path program 1 times [2023-07-03 22:51:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013486524] [2023-07-03 22:51:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:39,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:51:39,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:51:39,450 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:39,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013486524] [2023-07-03 22:51:39,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013486524] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:51:39,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:51:39,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:51:39,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127698234] [2023-07-03 22:51:39,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:51:39,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:51:39,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:51:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:51:39,451 INFO L87 Difference]: Start difference. First operand 5030 states and 13018 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:45,796 INFO L93 Difference]: Finished difference Result 10944 states and 30985 transitions. [2023-07-03 22:51:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-07-03 22:51:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:51:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:50,877 INFO L225 Difference]: With dead ends: 10944 [2023-07-03 22:51:50,878 INFO L226 Difference]: Without dead ends: 10944 [2023-07-03 22:51:50,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-07-03 22:51:50,878 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 344 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:50,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 631 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-07-03 22:51:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2023-07-03 22:51:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 9639. [2023-07-03 22:51:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 7466 states have (on average 2.5574604875435307) internal successors, (19094), 8213 states have internal predecessors, (19094), 2167 states have call successors, (2167), 2 states have call predecessors, (2167), 5 states have return successors, (6643), 1423 states have call predecessors, (6643), 2167 states have call successors, (6643) [2023-07-03 22:51:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 27904 transitions. [2023-07-03 22:51:57,914 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 27904 transitions. Word has length 27 [2023-07-03 22:51:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:57,914 INFO L495 AbstractCegarLoop]: Abstraction has 9639 states and 27904 transitions. [2023-07-03 22:51:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:51:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 27904 transitions. [2023-07-03 22:52:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:52:01,095 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:01,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:01,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-07-03 22:52:01,096 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:01,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1060768147, now seen corresponding path program 1 times [2023-07-03 22:52:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:01,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734323974] [2023-07-03 22:52:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:01,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:52:01,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:52:01,141 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734323974] [2023-07-03 22:52:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [734323974] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:01,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:52:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238165890] [2023-07-03 22:52:01,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:52:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:52:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:52:01,143 INFO L87 Difference]: Start difference. First operand 9639 states and 27904 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:52:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:15,596 INFO L93 Difference]: Finished difference Result 14693 states and 53055 transitions. [2023-07-03 22:52:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-07-03 22:52:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-07-03 22:52:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:26,029 INFO L225 Difference]: With dead ends: 14693 [2023-07-03 22:52:26,029 INFO L226 Difference]: Without dead ends: 14693 [2023-07-03 22:52:26,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-07-03 22:52:26,030 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 477 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:26,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 455 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-07-03 22:52:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14693 states. [2023-07-03 22:52:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14693 to 9923. [2023-07-03 22:52:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9923 states, 7600 states have (on average 2.5677631578947366) internal successors, (19515), 8455 states have internal predecessors, (19515), 2317 states have call successors, (2317), 2 states have call predecessors, (2317), 5 states have return successors, (7207), 1465 states have call predecessors, (7207), 2317 states have call successors, (7207) [2023-07-03 22:52:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9923 states to 9923 states and 29039 transitions. [2023-07-03 22:52:36,609 INFO L78 Accepts]: Start accepts. Automaton has 9923 states and 29039 transitions. Word has length 30 [2023-07-03 22:52:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:36,609 INFO L495 AbstractCegarLoop]: Abstraction has 9923 states and 29039 transitions. [2023-07-03 22:52:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:52:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9923 states and 29039 transitions. [2023-07-03 22:52:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:52:42,094 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:42,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-07-03 22:52:42,094 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:42,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash -628911017, now seen corresponding path program 1 times [2023-07-03 22:52:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:42,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723881986] [2023-07-03 22:52:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:42,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2023-07-03 22:52:42,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-07-03 22:52:42,149 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:42,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723881986] [2023-07-03 22:52:42,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [723881986] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:42,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:42,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:42,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301768259] [2023-07-03 22:52:42,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:42,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:42,151 INFO L87 Difference]: Start difference. First operand 9923 states and 29039 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:52:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:55,384 INFO L93 Difference]: Finished difference Result 15172 states and 51278 transitions. [2023-07-03 22:52:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-07-03 22:52:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:53:07,883 INFO L225 Difference]: With dead ends: 15172 [2023-07-03 22:53:07,883 INFO L226 Difference]: Without dead ends: 15172 [2023-07-03 22:53:07,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:53:07,884 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 63 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:53:07,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 575 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:53:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15172 states. [2023-07-03 22:53:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15172 to 15172. [2023-07-03 22:53:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15172 states, 10533 states have (on average 3.0600968385075475) internal successors, (32232), 12240 states have internal predecessors, (32232), 4633 states have call successors, (4633), 2 states have call predecessors, (4633), 5 states have return successors, (14413), 2929 states have call predecessors, (14413), 4633 states have call successors, (14413)