/usr/bin/java -Xmx15000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:49:05,280 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:49:05,323 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/ThreadModularVerifier.Settings.epf [2023-07-03 22:49:05,330 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:49:05,334 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:49:05,334 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:49:05,335 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:49:05,335 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:49:05,335 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:49:05,340 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:49:05,340 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:49:05,340 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:49:05,340 INFO L137 SettingsManager]: * File name=CHC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:49:05,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:49:05,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:49:05,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:49:05,550 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:49:05,551 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:49:05,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl [2023-07-03 22:49:05,552 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/inc-dec-eq0-locked.bpl' [2023-07-03 22:49:05,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:49:05,567 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:49:05,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:49:05,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:49:05,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:49:05,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,590 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:49:05,591 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:49:05,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:49:05,591 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:49:05,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:49:05,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:49:05,642 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 22:49:05,650 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 22:49:05,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2023-07-03 22:49:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-07-03 22:49:05,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-07-03 22:49:05,700 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:49:05,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:49:05,705 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:49:05,755 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:49:05,763 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:49:05,763 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:49:05,765 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:49:05 BoogieIcfgContainer [2023-07-03 22:49:05,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:49:05,766 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:49:05,766 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:49:05,766 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:49:05,768 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:49:05" (1/1) ... [2023-07-03 22:49:06,044 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'lock := false;' is: true [2023-07-03 22:49:06,047 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,049 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,051 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,053 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,054 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,056 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,058 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,060 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,061 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,085 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'lock := false;' is: false [2023-07-03 22:49:06,087 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,089 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,091 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,093 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,095 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,097 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,099 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,101 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,102 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,111 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,120 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,123 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,125 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,127 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,129 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,131 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,133 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,136 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,138 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,146 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,148 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,150 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,152 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,154 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,156 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,158 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,160 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,162 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,163 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,178 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,180 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,182 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,183 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,185 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,187 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,189 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,192 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,194 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,197 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,202 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,204 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,205 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,207 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,208 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,210 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,212 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,213 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,215 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,216 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,225 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,227 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,228 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,230 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,231 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,232 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,234 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,235 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,237 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,238 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,243 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,244 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,246 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,247 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,249 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,250 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,252 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,253 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,254 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,256 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,260 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,261 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,263 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,264 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,266 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,267 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,268 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,269 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,271 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,272 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,276 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'lock := false;' is: true [2023-07-03 22:49:06,278 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,279 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,281 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,282 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,283 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,284 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,286 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,287 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,288 INFO L180 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,293 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'lock := false;' is: true [2023-07-03 22:49:06,302 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,303 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,304 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,305 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x - 1;' is: true [2023-07-03 22:49:06,306 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,307 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,309 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,310 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'x := x + 1;' is: true [2023-07-03 22:49:06,311 INFO L180 IndependenceChecker]: instantiated independence condition for 'lock := false;' and 'assume !lock;lock := true;' is: false [2023-07-03 22:49:06,314 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'lock := false;' is: true [2023-07-03 22:49:06,315 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,316 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,317 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,318 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x - 1;' is: true [2023-07-03 22:49:06,319 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,320 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,321 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,321 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'x := x + 1;' is: true [2023-07-03 22:49:06,322 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume !lock;lock := true;' is: true [2023-07-03 22:49:06,368 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:49:06 HornClauseAST [2023-07-03 22:49:06,369 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:49:06,370 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:49:06,370 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:49:06,370 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:49:06,371 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,372 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked/CHC_inc-dec-eq0-locked.bpl_UID4574239883634400901.smt2 [2023-07-03 22:49:06,404 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:49:06,404 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:49:06,404 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:49:06,405 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:49:06,406 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,435 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06 Unit [2023-07-03 22:49:06,436 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:49:06,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:49:06,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:49:06,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:49:06,438 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,465 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,474 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,476 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:49:06,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:49:06,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:49:06,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:49:06,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (1/1) ... [2023-07-03 22:49:06,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:49:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:49:06,500 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 22:49:06,506 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 22:49:06,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:49:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:49:06,510 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:49:06,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:49:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:49:06,510 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:49:06,526 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:49:06,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:49:06,970 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:49:06,972 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:49:06,972 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:49:06,972 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:49:06 BoogieIcfgContainer [2023-07-03 22:49:06,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:49:06,982 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:49:06,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:49:07,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:49:07,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:49:05" (1/5) ... [2023-07-03 22:49:07,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a70e6 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:49:07, skipping insertion in model container [2023-07-03 22:49:07,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:49:05" (2/5) ... [2023-07-03 22:49:07,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a70e6 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:49:07, skipping insertion in model container [2023-07-03 22:49:07,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:49:06" (3/5) ... [2023-07-03 22:49:07,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a70e6 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:49:07, skipping insertion in model container [2023-07-03 22:49:07,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:49:06" (4/5) ... [2023-07-03 22:49:07,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a70e6 and model type inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:49:07, skipping insertion in model container [2023-07-03 22:49:07,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:49:06" (5/5) ... [2023-07-03 22:49:07,173 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:49:07,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:49:07,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:49:07,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:49:07,385 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;@7559c746, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:49:07,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:49:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-07-03 22:49:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:49:07,403 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:07,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:07,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:07,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 302690729, now seen corresponding path program 1 times [2023-07-03 22:49:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850407248] [2023-07-03 22:49:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:07,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:07,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:07,557 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 22:49:07,560 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850407248] [2023-07-03 22:49:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [850407248] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:07,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:07,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:07,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038445686] [2023-07-03 22:49:07,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:07,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:07,595 INFO L87 Difference]: Start difference. First operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:08,246 INFO L93 Difference]: Finished difference Result 410 states and 676 transitions. [2023-07-03 22:49:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:08,248 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 22:49:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:08,263 INFO L225 Difference]: With dead ends: 410 [2023-07-03 22:49:08,264 INFO L226 Difference]: Without dead ends: 408 [2023-07-03 22:49:08,266 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 22:49:08,268 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 561 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:08,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 466 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-07-03 22:49:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-07-03 22:49:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 260 states have (on average 1.476923076923077) internal successors, (384), 260 states have internal predecessors, (384), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-07-03 22:49:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 674 transitions. [2023-07-03 22:49:08,350 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 674 transitions. Word has length 8 [2023-07-03 22:49:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:08,351 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 674 transitions. [2023-07-03 22:49:08,352 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 22:49:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 674 transitions. [2023-07-03 22:49:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:49:08,360 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:08,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:49:08,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:08,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1251489235, now seen corresponding path program 1 times [2023-07-03 22:49:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521283887] [2023-07-03 22:49:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:08,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:08,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:08,381 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 22:49:08,382 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:08,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521283887] [2023-07-03 22:49:08,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [521283887] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:08,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:08,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15883258] [2023-07-03 22:49:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:08,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:08,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:08,384 INFO L87 Difference]: Start difference. First operand 408 states and 674 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:08,905 INFO L93 Difference]: Finished difference Result 674 states and 1180 transitions. [2023-07-03 22:49:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:08,905 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 22:49:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:08,925 INFO L225 Difference]: With dead ends: 674 [2023-07-03 22:49:08,925 INFO L226 Difference]: Without dead ends: 674 [2023-07-03 22:49:08,926 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 22:49:08,926 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 61 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:08,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1030 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-07-03 22:49:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 458. [2023-07-03 22:49:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 310 states have (on average 1.7096774193548387) internal successors, (530), 310 states have internal predecessors, (530), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-07-03 22:49:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 820 transitions. [2023-07-03 22:49:08,995 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 820 transitions. Word has length 10 [2023-07-03 22:49:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:08,996 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 820 transitions. [2023-07-03 22:49:08,996 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 22:49:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 820 transitions. [2023-07-03 22:49:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:49:09,004 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:09,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:09,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:49:09,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:09,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1878231119, now seen corresponding path program 1 times [2023-07-03 22:49:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:09,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383724674] [2023-07-03 22:49:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:09,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:09,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:09,025 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 22:49:09,025 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383724674] [2023-07-03 22:49:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383724674] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:09,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:09,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:09,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079530624] [2023-07-03 22:49:09,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:09,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:09,027 INFO L87 Difference]: Start difference. First operand 458 states and 820 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:09,583 INFO L93 Difference]: Finished difference Result 772 states and 1374 transitions. [2023-07-03 22:49:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:09,584 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 22:49:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:09,604 INFO L225 Difference]: With dead ends: 772 [2023-07-03 22:49:09,605 INFO L226 Difference]: Without dead ends: 772 [2023-07-03 22:49:09,605 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 22:49:09,606 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 85 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1090 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-07-03 22:49:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 700. [2023-07-03 22:49:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 456 states have (on average 1.6929824561403508) internal successors, (772), 456 states have internal predecessors, (772), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-07-03 22:49:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1254 transitions. [2023-07-03 22:49:09,678 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1254 transitions. Word has length 10 [2023-07-03 22:49:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:09,678 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1254 transitions. [2023-07-03 22:49:09,678 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 22:49:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1254 transitions. [2023-07-03 22:49:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:49:09,705 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:09,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:49:09,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:09,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2019889692, now seen corresponding path program 1 times [2023-07-03 22:49:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488428239] [2023-07-03 22:49:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:09,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:09,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:09,728 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 22:49:09,728 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488428239] [2023-07-03 22:49:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1488428239] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:09,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923897633] [2023-07-03 22:49:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:09,730 INFO L87 Difference]: Start difference. First operand 700 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:10,260 INFO L93 Difference]: Finished difference Result 1112 states and 2080 transitions. [2023-07-03 22:49:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:10,261 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 22:49:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:10,304 INFO L225 Difference]: With dead ends: 1112 [2023-07-03 22:49:10,304 INFO L226 Difference]: Without dead ends: 1112 [2023-07-03 22:49:10,305 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 22:49:10,305 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 63 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:10,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1028 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:49:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-07-03 22:49:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 752. [2023-07-03 22:49:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 508 states have (on average 1.9645669291338583) internal successors, (998), 508 states have internal predecessors, (998), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-07-03 22:49:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1480 transitions. [2023-07-03 22:49:10,384 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1480 transitions. Word has length 13 [2023-07-03 22:49:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:10,384 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1480 transitions. [2023-07-03 22:49:10,384 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 22:49:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1480 transitions. [2023-07-03 22:49:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:49:10,411 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:10,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:10,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:49:10,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:10,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1021372106, now seen corresponding path program 1 times [2023-07-03 22:49:10,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:10,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083714849] [2023-07-03 22:49:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:10,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:10,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:10,432 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 22:49:10,433 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:10,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083714849] [2023-07-03 22:49:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083714849] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:10,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:10,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863785227] [2023-07-03 22:49:10,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:10,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:10,434 INFO L87 Difference]: Start difference. First operand 752 states and 1480 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:10,945 INFO L93 Difference]: Finished difference Result 1070 states and 2194 transitions. [2023-07-03 22:49:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:10,946 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 22:49:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:10,981 INFO L225 Difference]: With dead ends: 1070 [2023-07-03 22:49:10,982 INFO L226 Difference]: Without dead ends: 1070 [2023-07-03 22:49:10,982 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 22:49:10,982 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 87 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:10,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1088 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:49:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2023-07-03 22:49:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 998. [2023-07-03 22:49:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 658 states have (on average 2.127659574468085) internal successors, (1400), 658 states have internal predecessors, (1400), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-07-03 22:49:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2074 transitions. [2023-07-03 22:49:11,064 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2074 transitions. Word has length 13 [2023-07-03 22:49:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:11,064 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 2074 transitions. [2023-07-03 22:49:11,064 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 22:49:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2074 transitions. [2023-07-03 22:49:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:49:11,135 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:11,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:49:11,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:11,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2013488785, now seen corresponding path program 1 times [2023-07-03 22:49:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248420424] [2023-07-03 22:49:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:11,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:11,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:11,192 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 22:49:11,192 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248420424] [2023-07-03 22:49:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [248420424] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:11,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:11,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112709367] [2023-07-03 22:49:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:11,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:11,194 INFO L87 Difference]: Start difference. First operand 998 states and 2074 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:11,813 INFO L93 Difference]: Finished difference Result 1556 states and 3226 transitions. [2023-07-03 22:49:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:11,813 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 22:49:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:11,899 INFO L225 Difference]: With dead ends: 1556 [2023-07-03 22:49:11,899 INFO L226 Difference]: Without dead ends: 1556 [2023-07-03 22:49:11,899 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 22:49:11,901 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 65 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:11,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1026 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-07-03 22:49:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1052. [2023-07-03 22:49:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 712 states have (on average 2.404494382022472) internal successors, (1712), 712 states have internal predecessors, (1712), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-07-03 22:49:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2386 transitions. [2023-07-03 22:49:12,027 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2386 transitions. Word has length 16 [2023-07-03 22:49:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:12,027 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 2386 transitions. [2023-07-03 22:49:12,028 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 22:49:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2386 transitions. [2023-07-03 22:49:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:49:12,123 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:12,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:49:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:49:12,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:12,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 719065799, now seen corresponding path program 1 times [2023-07-03 22:49:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20705248] [2023-07-03 22:49:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:12,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:12,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:12,164 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 22:49:12,165 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20705248] [2023-07-03 22:49:12,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [20705248] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:12,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:12,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7530496] [2023-07-03 22:49:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:12,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:12,166 INFO L87 Difference]: Start difference. First operand 1052 states and 2386 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:12,672 INFO L93 Difference]: Finished difference Result 1372 states and 3190 transitions. [2023-07-03 22:49:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:12,673 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 22:49:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:12,731 INFO L225 Difference]: With dead ends: 1372 [2023-07-03 22:49:12,731 INFO L226 Difference]: Without dead ends: 1372 [2023-07-03 22:49:12,731 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 22:49:12,732 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 89 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:12,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1086 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:49:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2023-07-03 22:49:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1300. [2023-07-03 22:49:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 864 states have (on average 2.550925925925926) internal successors, (2204), 864 states have internal predecessors, (2204), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-07-03 22:49:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3070 transitions. [2023-07-03 22:49:12,844 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3070 transitions. Word has length 16 [2023-07-03 22:49:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:12,845 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 3070 transitions. [2023-07-03 22:49:12,845 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 22:49:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3070 transitions. [2023-07-03 22:49:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:49:13,040 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:13,040 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 22:49:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:49:13,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:13,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1677503500, now seen corresponding path program 1 times [2023-07-03 22:49:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665752720] [2023-07-03 22:49:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:13,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:13,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:13,073 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 22:49:13,074 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665752720] [2023-07-03 22:49:13,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [665752720] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:13,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:13,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835328726] [2023-07-03 22:49:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:13,075 INFO L87 Difference]: Start difference. First operand 1300 states and 3070 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:13,748 INFO L93 Difference]: Finished difference Result 2004 states and 4554 transitions. [2023-07-03 22:49:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:13,748 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 22:49:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:13,945 INFO L225 Difference]: With dead ends: 2004 [2023-07-03 22:49:13,945 INFO L226 Difference]: Without dead ends: 2004 [2023-07-03 22:49:13,945 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 22:49:13,946 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 67 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:13,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1024 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2023-07-03 22:49:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1356. [2023-07-03 22:49:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 920 states have (on average 2.8347826086956522) internal successors, (2608), 920 states have internal predecessors, (2608), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-07-03 22:49:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3474 transitions. [2023-07-03 22:49:14,241 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3474 transitions. Word has length 19 [2023-07-03 22:49:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:14,241 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 3474 transitions. [2023-07-03 22:49:14,241 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 22:49:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3474 transitions. [2023-07-03 22:49:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:49:14,379 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:14,379 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 22:49:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:49:14,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:14,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash 327600528, now seen corresponding path program 1 times [2023-07-03 22:49:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951731938] [2023-07-03 22:49:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:14,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:14,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:14,400 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 22:49:14,400 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951731938] [2023-07-03 22:49:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951731938] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:14,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:14,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:14,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876720587] [2023-07-03 22:49:14,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:14,402 INFO L87 Difference]: Start difference. First operand 1356 states and 3474 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:14,944 INFO L93 Difference]: Finished difference Result 1678 states and 4374 transitions. [2023-07-03 22:49:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:14,944 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 22:49:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:15,022 INFO L225 Difference]: With dead ends: 1678 [2023-07-03 22:49:15,023 INFO L226 Difference]: Without dead ends: 1678 [2023-07-03 22:49:15,023 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 22:49:15,023 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 91 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1084 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:49:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2023-07-03 22:49:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1606. [2023-07-03 22:49:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1074 states have (on average 2.9757914338919926) internal successors, (3196), 1074 states have internal predecessors, (3196), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-07-03 22:49:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 4254 transitions. [2023-07-03 22:49:15,175 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 4254 transitions. Word has length 19 [2023-07-03 22:49:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:15,175 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 4254 transitions. [2023-07-03 22:49:15,175 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 22:49:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 4254 transitions. [2023-07-03 22:49:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:49:15,625 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:15,625 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 22:49:15,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:49:15,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:15,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1363825087, now seen corresponding path program 1 times [2023-07-03 22:49:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:15,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560328988] [2023-07-03 22:49:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:15,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:15,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:15,697 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 22:49:15,697 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:15,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560328988] [2023-07-03 22:49:15,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560328988] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:15,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:15,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:15,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084801058] [2023-07-03 22:49:15,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:15,699 INFO L87 Difference]: Start difference. First operand 1606 states and 4254 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:16,425 INFO L93 Difference]: Finished difference Result 2456 states and 6076 transitions. [2023-07-03 22:49:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:16,426 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 22:49:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:16,619 INFO L225 Difference]: With dead ends: 2456 [2023-07-03 22:49:16,619 INFO L226 Difference]: Without dead ends: 2456 [2023-07-03 22:49:16,619 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 22:49:16,633 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 69 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:16,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1022 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2023-07-03 22:49:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1664. [2023-07-03 22:49:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1132 states have (on average 3.26678445229682) internal successors, (3698), 1132 states have internal predecessors, (3698), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-07-03 22:49:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 4756 transitions. [2023-07-03 22:49:16,955 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 4756 transitions. Word has length 22 [2023-07-03 22:49:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:16,957 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 4756 transitions. [2023-07-03 22:49:16,957 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 22:49:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 4756 transitions. [2023-07-03 22:49:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:49:17,433 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:17,433 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 22:49:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:49:17,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:17,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 44839845, now seen corresponding path program 1 times [2023-07-03 22:49:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128074274] [2023-07-03 22:49:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:17,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:17,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:17,454 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 22:49:17,454 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128074274] [2023-07-03 22:49:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [128074274] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:17,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:17,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198823040] [2023-07-03 22:49:17,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:17,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:17,455 INFO L87 Difference]: Start difference. First operand 1664 states and 4756 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:49:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:17,972 INFO L93 Difference]: Finished difference Result 1988 states and 5758 transitions. [2023-07-03 22:49:17,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:17,973 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 22:49:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:18,102 INFO L225 Difference]: With dead ends: 1988 [2023-07-03 22:49:18,103 INFO L226 Difference]: Without dead ends: 1988 [2023-07-03 22:49:18,103 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 22:49:18,103 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 93 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:18,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1082 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:49:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-07-03 22:49:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1916. [2023-07-03 22:49:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1288 states have (on average 3.406832298136646) internal successors, (4388), 1288 states have internal predecessors, (4388), 625 states have call successors, (625), 2 states have call predecessors, (625), 2 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2023-07-03 22:49:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 5638 transitions. [2023-07-03 22:49:18,444 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 5638 transitions. Word has length 22 [2023-07-03 22:49:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 5638 transitions. [2023-07-03 22:49:18,444 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 22:49:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 5638 transitions. [2023-07-03 22:49:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:19,187 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:19,187 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 22:49:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:49:19,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:19,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash 711628727, now seen corresponding path program 1 times [2023-07-03 22:49:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:19,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075949935] [2023-07-03 22:49:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:19,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:19,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:19,209 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 22:49:19,209 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075949935] [2023-07-03 22:49:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075949935] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:19,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:19,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145632251] [2023-07-03 22:49:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:19,211 INFO L87 Difference]: Start difference. First operand 1916 states and 5638 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:49:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:20,040 INFO L93 Difference]: Finished difference Result 2238 states and 6576 transitions. [2023-07-03 22:49:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:20,041 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 22:49:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:20,204 INFO L225 Difference]: With dead ends: 2238 [2023-07-03 22:49:20,204 INFO L226 Difference]: Without dead ends: 2238 [2023-07-03 22:49:20,204 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 22:49:20,205 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 107 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:20,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 881 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:49:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2023-07-03 22:49:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2166. [2023-07-03 22:49:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 1442 states have (on average 3.4771151178918167) internal successors, (5014), 1442 states have internal predecessors, (5014), 721 states have call successors, (721), 2 states have call predecessors, (721), 2 states have return successors, (721), 721 states have call predecessors, (721), 721 states have call successors, (721) [2023-07-03 22:49:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 6456 transitions. [2023-07-03 22:49:20,558 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 6456 transitions. Word has length 27 [2023-07-03 22:49:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:20,558 INFO L495 AbstractCegarLoop]: Abstraction has 2166 states and 6456 transitions. [2023-07-03 22:49:20,558 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 22:49:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 6456 transitions. [2023-07-03 22:49:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:21,508 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:21,508 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 22:49:21,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:49:21,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:21,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash -254665830, now seen corresponding path program 1 times [2023-07-03 22:49:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:21,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373595512] [2023-07-03 22:49:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:21,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:21,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:21,541 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 22:49:21,541 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373595512] [2023-07-03 22:49:21,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373595512] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:21,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:21,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:21,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037096953] [2023-07-03 22:49:21,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:21,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:21,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:21,542 INFO L87 Difference]: Start difference. First operand 2166 states and 6456 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:49:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:22,357 INFO L93 Difference]: Finished difference Result 2488 states and 7414 transitions. [2023-07-03 22:49:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-07-03 22:49:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:22,595 INFO L225 Difference]: With dead ends: 2488 [2023-07-03 22:49:22,596 INFO L226 Difference]: Without dead ends: 2488 [2023-07-03 22:49:22,596 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 22:49:22,596 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 115 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:22,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 837 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:49:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2023-07-03 22:49:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2416. [2023-07-03 22:49:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1596 states have (on average 3.5463659147869673) internal successors, (5660), 1596 states have internal predecessors, (5660), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-07-03 22:49:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 7294 transitions. [2023-07-03 22:49:23,067 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 7294 transitions. Word has length 27 [2023-07-03 22:49:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:23,067 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 7294 transitions. [2023-07-03 22:49:23,068 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 22:49:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 7294 transitions. [2023-07-03 22:49:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:23,839 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:23,839 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 22:49:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:49:23,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:23,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1357728703, now seen corresponding path program 1 times [2023-07-03 22:49:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183552450] [2023-07-03 22:49:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:23,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:23,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:23,874 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 22:49:23,874 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183552450] [2023-07-03 22:49:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183552450] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460987997] [2023-07-03 22:49:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:23,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:23,875 INFO L87 Difference]: Start difference. First operand 2416 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:49:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:25,207 INFO L93 Difference]: Finished difference Result 3704 states and 10140 transitions. [2023-07-03 22:49:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:25,207 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 22:49:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:25,698 INFO L225 Difference]: With dead ends: 3704 [2023-07-03 22:49:25,698 INFO L226 Difference]: Without dead ends: 3704 [2023-07-03 22:49:25,698 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 22:49:25,698 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 84 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:25,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 853 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2023-07-03 22:49:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2480. [2023-07-03 22:49:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 1660 states have (on average 3.8951807228915665) internal successors, (6466), 1660 states have internal predecessors, (6466), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-07-03 22:49:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 8100 transitions. [2023-07-03 22:49:26,321 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 8100 transitions. Word has length 27 [2023-07-03 22:49:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:26,321 INFO L495 AbstractCegarLoop]: Abstraction has 2480 states and 8100 transitions. [2023-07-03 22:49:26,322 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 22:49:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 8100 transitions. [2023-07-03 22:49:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:27,169 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:27,169 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 22:49:27,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:49:27,170 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:27,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash 193031466, now seen corresponding path program 1 times [2023-07-03 22:49:27,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:27,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530767545] [2023-07-03 22:49:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:27,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:27,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:27,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:27,202 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 22:49:27,202 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530767545] [2023-07-03 22:49:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [530767545] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:27,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:27,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:27,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347265495] [2023-07-03 22:49:27,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:27,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:27,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:27,204 INFO L87 Difference]: Start difference. First operand 2480 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:49:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:28,509 INFO L93 Difference]: Finished difference Result 3768 states and 11042 transitions. [2023-07-03 22:49:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:28,510 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 22:49:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:29,096 INFO L225 Difference]: With dead ends: 3768 [2023-07-03 22:49:29,097 INFO L226 Difference]: Without dead ends: 3768 [2023-07-03 22:49:29,098 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 22:49:29,099 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 114 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:29,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 733 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:49:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2023-07-03 22:49:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 2544. [2023-07-03 22:49:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 1724 states have (on average 4.273781902552204) internal successors, (7368), 1724 states have internal predecessors, (7368), 817 states have call successors, (817), 2 states have call predecessors, (817), 2 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2023-07-03 22:49:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 9002 transitions. [2023-07-03 22:49:29,754 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 9002 transitions. Word has length 27 [2023-07-03 22:49:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:29,754 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 9002 transitions. [2023-07-03 22:49:29,755 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 22:49:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 9002 transitions. [2023-07-03 22:49:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:30,652 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:30,653 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 22:49:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:49:30,655 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:30,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -366590154, now seen corresponding path program 1 times [2023-07-03 22:49:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:30,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785884717] [2023-07-03 22:49:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:30,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:30,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-07-03 22:49:30,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:30,722 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 22:49:30,722 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785884717] [2023-07-03 22:49:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785884717] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:49:30,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:49:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-07-03 22:49:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934900894] [2023-07-03 22:49:30,723 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:49:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-07-03 22:49:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-07-03 22:49:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:49:30,724 INFO L87 Difference]: Start difference. First operand 2544 states and 9002 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:49:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:36,191 INFO L93 Difference]: Finished difference Result 7594 states and 28397 transitions. [2023-07-03 22:49:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:49:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-07-03 22:49:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:39,295 INFO L225 Difference]: With dead ends: 7594 [2023-07-03 22:49:39,295 INFO L226 Difference]: Without dead ends: 7593 [2023-07-03 22:49:39,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-07-03 22:49:39,298 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 835 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:39,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 1149 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-07-03 22:49:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2023-07-03 22:49:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6475. [2023-07-03 22:49:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 4374 states have (on average 4.217192501143119) internal successors, (18446), 4375 states have internal predecessors, (18446), 2097 states have call successors, (2097), 2 states have call predecessors, (2097), 3 states have return successors, (4133), 2097 states have call predecessors, (4133), 2097 states have call successors, (4133) [2023-07-03 22:49:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 24676 transitions. [2023-07-03 22:49:43,279 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 24676 transitions. Word has length 27 [2023-07-03 22:49:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:43,280 INFO L495 AbstractCegarLoop]: Abstraction has 6475 states and 24676 transitions. [2023-07-03 22:49:43,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:49:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 24676 transitions. [2023-07-03 22:49:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:45,753 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:45,753 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 22:49:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:49:45,753 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:45,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1092582821, now seen corresponding path program 1 times [2023-07-03 22:49:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956464358] [2023-07-03 22:49:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:45,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:45,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:45,774 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 22:49:45,774 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:45,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956464358] [2023-07-03 22:49:45,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [956464358] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:45,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:45,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:45,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543896608] [2023-07-03 22:49:45,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:45,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:45,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:45,775 INFO L87 Difference]: Start difference. First operand 6475 states and 24676 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:49:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:49,244 INFO L93 Difference]: Finished difference Result 7398 states and 28455 transitions. [2023-07-03 22:49:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:49:49,244 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 22:49:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:49:51,986 INFO L225 Difference]: With dead ends: 7398 [2023-07-03 22:49:51,986 INFO L226 Difference]: Without dead ends: 7398 [2023-07-03 22:49:51,993 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 22:49:51,996 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 123 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:49:51,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 793 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:49:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7398 states. [2023-07-03 22:49:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7398 to 7194. [2023-07-03 22:49:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 4821 states have (on average 4.344534328977391) internal successors, (20945), 4822 states have internal predecessors, (20945), 2369 states have call successors, (2369), 2 states have call predecessors, (2369), 3 states have return successors, (4669), 2369 states have call predecessors, (4669), 2369 states have call successors, (4669) [2023-07-03 22:49:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 27983 transitions. [2023-07-03 22:49:56,699 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 27983 transitions. Word has length 27 [2023-07-03 22:49:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:49:56,700 INFO L495 AbstractCegarLoop]: Abstraction has 7194 states and 27983 transitions. [2023-07-03 22:49:56,701 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 22:49:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 27983 transitions. [2023-07-03 22:49:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:49:58,513 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:49:58,513 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 22:49:58,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:49:58,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:49:58,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:49:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -676917158, now seen corresponding path program 1 times [2023-07-03 22:49:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:49:58,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409961993] [2023-07-03 22:49:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:49:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:49:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:49:58,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:49:58,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:49:58,554 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 22:49:58,555 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:49:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409961993] [2023-07-03 22:49:58,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409961993] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:49:58,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:49:58,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:49:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006521846] [2023-07-03 22:49:58,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:49:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:49:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:49:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:49:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:49:58,556 INFO L87 Difference]: Start difference. First operand 7194 states and 27983 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:50:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:50:03,285 INFO L93 Difference]: Finished difference Result 8117 states and 31801 transitions. [2023-07-03 22:50:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:50:03,285 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 22:50:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:50:07,590 INFO L225 Difference]: With dead ends: 8117 [2023-07-03 22:50:07,591 INFO L226 Difference]: Without dead ends: 8117 [2023-07-03 22:50:07,591 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 22:50:07,591 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 127 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-07-03 22:50:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 771 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-07-03 22:50:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2023-07-03 22:50:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7913. [2023-07-03 22:50:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 5268 states have (on average 4.457668944570995) internal successors, (23483), 5269 states have internal predecessors, (23483), 2641 states have call successors, (2641), 2 states have call predecessors, (2641), 3 states have return successors, (5205), 2641 states have call predecessors, (5205), 2641 states have call successors, (5205) [2023-07-03 22:50:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 31329 transitions. [2023-07-03 22:50:12,748 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 31329 transitions. Word has length 27 [2023-07-03 22:50:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:50:12,748 INFO L495 AbstractCegarLoop]: Abstraction has 7913 states and 31329 transitions. [2023-07-03 22:50:12,756 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 22:50:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 31329 transitions. [2023-07-03 22:50:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:50:14,746 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:50:14,746 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 22:50:14,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-07-03 22:50:14,746 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:50:14,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:50:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1848634210, now seen corresponding path program 1 times [2023-07-03 22:50:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:50:14,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079008920] [2023-07-03 22:50:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:50:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:50:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:50:14,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:50:14,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:50:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:50:14,810 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:50:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079008920] [2023-07-03 22:50:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079008920] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:50:14,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:50:14,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:50:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313720880] [2023-07-03 22:50:14,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:50:14,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:50:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:50:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:50:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:50:14,812 INFO L87 Difference]: Start difference. First operand 7913 states and 31329 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:50:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:50:24,493 INFO L93 Difference]: Finished difference Result 12064 states and 43327 transitions. [2023-07-03 22:50:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:50:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:50:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:50:32,773 INFO L225 Difference]: With dead ends: 12064 [2023-07-03 22:50:32,773 INFO L226 Difference]: Without dead ends: 12064 [2023-07-03 22:50:32,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:50:32,774 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 72 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:50:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 527 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:50:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12064 states. [2023-07-03 22:50:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12064 to 7913. [2023-07-03 22:50:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 5268 states have (on average 4.457668944570995) internal successors, (23483), 5269 states have internal predecessors, (23483), 2641 states have call successors, (2641), 2 states have call predecessors, (2641), 3 states have return successors, (5205), 2641 states have call predecessors, (5205), 2641 states have call successors, (5205) [2023-07-03 22:50:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 31329 transitions. [2023-07-03 22:50:41,016 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 31329 transitions. Word has length 25 [2023-07-03 22:50:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:50:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 7913 states and 31329 transitions. [2023-07-03 22:50:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:50:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 31329 transitions. [2023-07-03 22:50:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:50:43,443 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:50:43,444 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 22:50:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-07-03 22:50:43,444 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:50:43,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:50:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -976324843, now seen corresponding path program 1 times [2023-07-03 22:50:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:50:43,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845600593] [2023-07-03 22:50:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:50:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:50:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:50:43,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:50:43,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:50:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:50:43,505 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:50:43,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845600593] [2023-07-03 22:50:43,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [845600593] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:50:43,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:50:43,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:50:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601660493] [2023-07-03 22:50:43,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:50:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:50:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:50:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:50:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:50:43,507 INFO L87 Difference]: Start difference. First operand 7913 states and 31329 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:50:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:50:47,907 INFO L93 Difference]: Finished difference Result 8840 states and 35085 transitions. [2023-07-03 22:50:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:50:47,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:50:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:50:51,833 INFO L225 Difference]: With dead ends: 8840 [2023-07-03 22:50:51,833 INFO L226 Difference]: Without dead ends: 8840 [2023-07-03 22:50:51,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:50:51,834 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 95 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:50:51,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 822 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:50:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8840 states. [2023-07-03 22:50:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8840 to 8636. [2023-07-03 22:50:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 5719 states have (on average 4.539080258786501) internal successors, (25959), 5720 states have internal predecessors, (25959), 2913 states have call successors, (2913), 2 states have call predecessors, (2913), 3 states have return successors, (5741), 2913 states have call predecessors, (5741), 2913 states have call successors, (5741) [2023-07-03 22:50:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 34613 transitions. [2023-07-03 22:50:58,106 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 34613 transitions. Word has length 25 [2023-07-03 22:50:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:50:58,106 INFO L495 AbstractCegarLoop]: Abstraction has 8636 states and 34613 transitions. [2023-07-03 22:50:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:50:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 34613 transitions. [2023-07-03 22:51:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:03,098 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:03,098 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 22:51:03,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-07-03 22:51:03,099 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:03,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1071734398, now seen corresponding path program 1 times [2023-07-03 22:51:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061838619] [2023-07-03 22:51:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:03,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:03,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:03,115 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061838619] [2023-07-03 22:51:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061838619] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789305325] [2023-07-03 22:51:03,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:03,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:03,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:03,116 INFO L87 Difference]: Start difference. First operand 8636 states and 34613 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-07-03 22:51:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:08,269 INFO L93 Difference]: Finished difference Result 9563 states and 38455 transitions. [2023-07-03 22:51:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:08,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-07-03 22:51:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:13,283 INFO L225 Difference]: With dead ends: 9563 [2023-07-03 22:51:13,283 INFO L226 Difference]: Without dead ends: 9563 [2023-07-03 22:51:13,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:13,284 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 99 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:13,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1021 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:51:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2023-07-03 22:51:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9359. [2023-07-03 22:51:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9359 states, 6170 states have (on average 4.622528363047001) internal successors, (28521), 6171 states have internal predecessors, (28521), 3185 states have call successors, (3185), 2 states have call predecessors, (3185), 3 states have return successors, (6277), 3185 states have call predecessors, (6277), 3185 states have call successors, (6277) [2023-07-03 22:51:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9359 states to 9359 states and 37983 transitions. [2023-07-03 22:51:21,881 INFO L78 Accepts]: Start accepts. Automaton has 9359 states and 37983 transitions. Word has length 30 [2023-07-03 22:51:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:21,894 INFO L495 AbstractCegarLoop]: Abstraction has 9359 states and 37983 transitions. [2023-07-03 22:51:21,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-07-03 22:51:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 9359 states and 37983 transitions. [2023-07-03 22:51:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:28,308 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:28,308 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 22:51:28,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-07-03 22:51:28,308 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:28,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash 328322903, now seen corresponding path program 1 times [2023-07-03 22:51:28,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:28,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102564986] [2023-07-03 22:51:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:28,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:28,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:28,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:51:28,332 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102564986] [2023-07-03 22:51:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102564986] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945235002] [2023-07-03 22:51:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:28,333 INFO L87 Difference]: Start difference. First operand 9359 states and 37983 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:51:36,377 INFO L93 Difference]: Finished difference Result 10895 states and 43325 transitions. [2023-07-03 22:51:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:51:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-07-03 22:51:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:51:42,827 INFO L225 Difference]: With dead ends: 10895 [2023-07-03 22:51:42,827 INFO L226 Difference]: Without dead ends: 10895 [2023-07-03 22:51:42,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:51:42,827 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:51:42,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 752 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:51:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2023-07-03 22:51:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10691. [2023-07-03 22:51:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10691 states, 6998 states have (on average 4.557730780222921) internal successors, (31895), 6999 states have internal predecessors, (31895), 3689 states have call successors, (3689), 2 states have call predecessors, (3689), 3 states have return successors, (7269), 3689 states have call predecessors, (7269), 3689 states have call successors, (7269) [2023-07-03 22:51:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10691 states to 10691 states and 42853 transitions. [2023-07-03 22:51:52,500 INFO L78 Accepts]: Start accepts. Automaton has 10691 states and 42853 transitions. Word has length 30 [2023-07-03 22:51:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:51:52,500 INFO L495 AbstractCegarLoop]: Abstraction has 10691 states and 42853 transitions. [2023-07-03 22:51:52,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-07-03 22:51:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10691 states and 42853 transitions. [2023-07-03 22:51:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:51:59,491 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:51:59,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:51:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-07-03 22:51:59,492 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:51:59,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:51:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1551902749, now seen corresponding path program 1 times [2023-07-03 22:51:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:51:59,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867185563] [2023-07-03 22:51:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:51:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:51:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:51:59,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:51:59,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:51:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-07-03 22:51:59,530 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:51:59,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867185563] [2023-07-03 22:51:59,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [867185563] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:51:59,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:51:59,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:51:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654360110] [2023-07-03 22:51:59,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:51:59,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:51:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:51:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:51:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:51:59,531 INFO L87 Difference]: Start difference. First operand 10691 states and 42853 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)