/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/ticket/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/ticket/ticket.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:52:05,113 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:52:05,177 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/ticket/ThreadModularVerifier.Settings.epf [2023-07-03 22:52:05,185 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:52:05,186 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:52:05,186 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:52:05,187 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:52:05,187 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:52:05,187 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:52:05,191 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-07-03 22:52:05,191 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-07-03 22:52:05,192 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:52:05,192 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:52:05,193 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:52:05,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:52:05,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:52:05,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:52:05,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:52:05,416 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:52:05,416 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:52:05,417 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/ticket/ticket.bpl [2023-07-03 22:52:05,417 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/ticket/ticket.bpl' [2023-07-03 22:52:05,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:52:05,436 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:52:05,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:52:05,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:52:05,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:52:05,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:52:05,461 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:52:05,461 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:52:05,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:52:05,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:52:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:52:05,516 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 22:52:05,518 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 22:52:05,540 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:52:05,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:52:05,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:52:05,581 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:52:05,582 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:52:05,588 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:52:05,644 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:52:05,654 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:52:05,654 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:52:05,656 INFO L201 PluginConnector]: Adding new model ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:52:05 BoogieIcfgContainer [2023-07-03 22:52:05,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:52:05,656 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:52:05,657 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:52:05,657 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:52:05,658 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:52:05" (1/1) ... [2023-07-03 22:52:05,830 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:52:05,831 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:52:05,834 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'm := t;t := t + 1;' is: true [2023-07-03 22:52:05,836 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume m <= s;crit := true;' is: true [2023-07-03 22:52:05,838 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 's := s + 1;crit := false;' is: true [2023-07-03 22:52:05,852 INFO L180 IndependenceChecker]: instantiated independence condition for 'm := t;t := t + 1;' and 'assume true;' is: true [2023-07-03 22:52:05,854 INFO L180 IndependenceChecker]: instantiated independence condition for 'm := t;t := t + 1;' and 'assume true;' is: true [2023-07-03 22:52:05,861 INFO L180 IndependenceChecker]: instantiated independence condition for 'm := t;t := t + 1;' and 'm := t;t := t + 1;' is: false [2023-07-03 22:52:05,864 INFO L180 IndependenceChecker]: instantiated independence condition for 'm := t;t := t + 1;' and 'assume m <= s;crit := true;' is: true [2023-07-03 22:52:05,867 INFO L180 IndependenceChecker]: instantiated independence condition for 'm := t;t := t + 1;' and 's := s + 1;crit := false;' is: true [2023-07-03 22:52:05,875 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:52:05,876 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:52:05,878 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'm := t;t := t + 1;' is: true [2023-07-03 22:52:05,880 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume m <= s;crit := true;' is: true [2023-07-03 22:52:05,882 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 's := s + 1;crit := false;' is: true [2023-07-03 22:52:05,889 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume m <= s;crit := true;' and 'assume true;' is: true [2023-07-03 22:52:05,891 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume m <= s;crit := true;' and 'assume true;' is: true [2023-07-03 22:52:05,894 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume m <= s;crit := true;' and 'm := t;t := t + 1;' is: true [2023-07-03 22:52:05,899 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume m <= s;crit := true;' and 'assume m <= s;crit := true;' is: true [2023-07-03 22:52:05,931 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume m <= s;crit := true;' and 's := s + 1;crit := false;' is: false [2023-07-03 22:52:05,945 INFO L180 IndependenceChecker]: instantiated independence condition for 's := s + 1;crit := false;' and 'assume true;' is: true [2023-07-03 22:52:05,946 INFO L180 IndependenceChecker]: instantiated independence condition for 's := s + 1;crit := false;' and 'assume true;' is: true [2023-07-03 22:52:05,954 INFO L180 IndependenceChecker]: instantiated independence condition for 's := s + 1;crit := false;' and 'm := t;t := t + 1;' is: true [2023-07-03 22:52:05,957 INFO L180 IndependenceChecker]: instantiated independence condition for 's := s + 1;crit := false;' and 'assume m <= s;crit := true;' is: false [2023-07-03 22:52:05,969 INFO L180 IndependenceChecker]: instantiated independence condition for 's := s + 1;crit := false;' and 's := s + 1;crit := false;' is: true [2023-07-03 22:52:05,980 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:52:05,981 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:52:05,998 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'm := t;t := t + 1;' is: true [2023-07-03 22:52:05,999 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume m <= s;crit := true;' is: true [2023-07-03 22:52:06,001 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 's := s + 1;crit := false;' is: true [2023-07-03 22:52:06,041 INFO L201 PluginConnector]: Adding new model ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:52:06 HornClauseAST [2023-07-03 22:52:06,043 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:52:06,044 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:52:06,044 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:52:06,044 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:52:06,045 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,046 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/ticket/CHC_ticket.bpl_UID1293998449592234890.smt2 [2023-07-03 22:52:06,064 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:52:06,065 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:52:06,065 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:52:06,065 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:52:06,068 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,097 INFO L201 PluginConnector]: Adding new model ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06 Unit [2023-07-03 22:52:06,097 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:52:06,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:52:06,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:52:06,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:52:06,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,103 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,118 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,120 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:52:06,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:52:06,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:52:06,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:52:06,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (1/1) ... [2023-07-03 22:52:06,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:52:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:52:06,140 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 22:52:06,142 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 22:52:06,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:52:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:52:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:52:06,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:52:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:52:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:52:06,160 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:52:06,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:52:06,418 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:52:06,424 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:52:06,424 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:52:06,425 INFO L201 PluginConnector]: Adding new model ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:52:06 BoogieIcfgContainer [2023-07-03 22:52:06,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:52:06,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:52:06,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:52:06,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:52:06,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:52:05" (1/5) ... [2023-07-03 22:52:06,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5525273c and model type ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:52:06, skipping insertion in model container [2023-07-03 22:52:06,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:52:05" (2/5) ... [2023-07-03 22:52:06,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5525273c and model type ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:52:06, skipping insertion in model container [2023-07-03 22:52:06,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:52:06" (3/5) ... [2023-07-03 22:52:06,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5525273c and model type ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:52:06, skipping insertion in model container [2023-07-03 22:52:06,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:52:06" (4/5) ... [2023-07-03 22:52:06,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5525273c and model type ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:52:06, skipping insertion in model container [2023-07-03 22:52:06,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:52:06" (5/5) ... [2023-07-03 22:52:06,435 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:52:06,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:52:06,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:52:06,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:52:06,492 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;@3540fb73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:52:06,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:52:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-07-03 22:52:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:52:06,516 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:06,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:06,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:06,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash 879802511, now seen corresponding path program 1 times [2023-07-03 22:52:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:06,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667011499] [2023-07-03 22:52:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:06,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:06,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:06,625 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 22:52:06,625 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667011499] [2023-07-03 22:52:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [667011499] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:06,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:06,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140413670] [2023-07-03 22:52:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:06,655 INFO L87 Difference]: Start difference. First operand has 112 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:52:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:07,017 INFO L93 Difference]: Finished difference Result 218 states and 352 transitions. [2023-07-03 22:52:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:07,019 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 22:52:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:07,029 INFO L225 Difference]: With dead ends: 218 [2023-07-03 22:52:07,029 INFO L226 Difference]: Without dead ends: 216 [2023-07-03 22:52:07,030 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 22:52:07,032 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 291 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:07,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 250 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:52:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-07-03 22:52:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-07-03 22:52:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 140 states have (on average 1.457142857142857) internal successors, (204), 140 states have internal predecessors, (204), 73 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-07-03 22:52:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 350 transitions. [2023-07-03 22:52:07,085 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 350 transitions. Word has length 8 [2023-07-03 22:52:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:07,086 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 350 transitions. [2023-07-03 22:52:07,086 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 22:52:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 350 transitions. [2023-07-03 22:52:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:52:07,101 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:07,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:52:07,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:07,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -494860013, now seen corresponding path program 1 times [2023-07-03 22:52:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852780628] [2023-07-03 22:52:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:07,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:07,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:07,132 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 22:52:07,132 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852780628] [2023-07-03 22:52:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852780628] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:07,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617216378] [2023-07-03 22:52:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:07,135 INFO L87 Difference]: Start difference. First operand 216 states and 350 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:52:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:07,393 INFO L93 Difference]: Finished difference Result 374 states and 636 transitions. [2023-07-03 22:52:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:07,393 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 22:52:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:07,406 INFO L225 Difference]: With dead ends: 374 [2023-07-03 22:52:07,407 INFO L226 Difference]: Without dead ends: 374 [2023-07-03 22:52:07,407 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 22:52:07,409 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 51 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:07,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 554 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-07-03 22:52:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 338. [2023-07-03 22:52:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 214 states have (on average 1.560747663551402) internal successors, (334), 214 states have internal predecessors, (334), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:52:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 576 transitions. [2023-07-03 22:52:07,472 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 576 transitions. Word has length 10 [2023-07-03 22:52:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:07,473 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 576 transitions. [2023-07-03 22:52:07,473 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 22:52:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 576 transitions. [2023-07-03 22:52:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:52:07,479 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:07,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:52:07,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:07,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1121601897, now seen corresponding path program 1 times [2023-07-03 22:52:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028892210] [2023-07-03 22:52:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:07,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:07,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:07,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:07,517 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 22:52:07,517 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028892210] [2023-07-03 22:52:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028892210] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78218049] [2023-07-03 22:52:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:07,520 INFO L87 Difference]: Start difference. First operand 338 states and 576 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 22:52:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:07,814 INFO L93 Difference]: Finished difference Result 546 states and 1014 transitions. [2023-07-03 22:52:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:07,815 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 22:52:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:07,830 INFO L225 Difference]: With dead ends: 546 [2023-07-03 22:52:07,830 INFO L226 Difference]: Without dead ends: 546 [2023-07-03 22:52:07,831 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 22:52:07,831 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 39 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:07,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 524 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-07-03 22:52:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 366. [2023-07-03 22:52:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 242 states have (on average 1.9504132231404958) internal successors, (472), 242 states have internal predecessors, (472), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-07-03 22:52:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 714 transitions. [2023-07-03 22:52:07,863 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 714 transitions. Word has length 10 [2023-07-03 22:52:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:07,863 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 714 transitions. [2023-07-03 22:52:07,863 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 22:52:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 714 transitions. [2023-07-03 22:52:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:52:07,872 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:07,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:52:07,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:07,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash 159997525, now seen corresponding path program 1 times [2023-07-03 22:52:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152372397] [2023-07-03 22:52:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:07,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:07,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:07,897 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 22:52:07,897 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152372397] [2023-07-03 22:52:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [152372397] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:07,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:07,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:07,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726122958] [2023-07-03 22:52:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:07,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:07,899 INFO L87 Difference]: Start difference. First operand 366 states and 714 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 22:52:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:08,123 INFO L93 Difference]: Finished difference Result 526 states and 1060 transitions. [2023-07-03 22:52:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:08,124 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 22:52:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:08,136 INFO L225 Difference]: With dead ends: 526 [2023-07-03 22:52:08,136 INFO L226 Difference]: Without dead ends: 526 [2023-07-03 22:52:08,136 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 22:52:08,137 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 53 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:08,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 552 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-07-03 22:52:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 490. [2023-07-03 22:52:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 318 states have (on average 2.0817610062893084) internal successors, (662), 318 states have internal predecessors, (662), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:52:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1000 transitions. [2023-07-03 22:52:08,167 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1000 transitions. Word has length 13 [2023-07-03 22:52:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:08,167 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1000 transitions. [2023-07-03 22:52:08,167 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 22:52:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1000 transitions. [2023-07-03 22:52:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:52:08,180 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:08,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:52:08,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:08,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash -304004069, now seen corresponding path program 1 times [2023-07-03 22:52:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301654299] [2023-07-03 22:52:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:08,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:08,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:08,204 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 22:52:08,205 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301654299] [2023-07-03 22:52:08,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [301654299] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:08,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:08,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:08,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134679407] [2023-07-03 22:52:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:08,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:08,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:08,206 INFO L87 Difference]: Start difference. First operand 490 states and 1000 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 22:52:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:08,466 INFO L93 Difference]: Finished difference Result 772 states and 1622 transitions. [2023-07-03 22:52:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:08,467 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 22:52:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:08,493 INFO L225 Difference]: With dead ends: 772 [2023-07-03 22:52:08,493 INFO L226 Difference]: Without dead ends: 772 [2023-07-03 22:52:08,493 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 22:52:08,494 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:08,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 522 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-07-03 22:52:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 520. [2023-07-03 22:52:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 348 states have (on average 2.4827586206896552) internal successors, (864), 348 states have internal predecessors, (864), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-07-03 22:52:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1202 transitions. [2023-07-03 22:52:08,536 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1202 transitions. Word has length 13 [2023-07-03 22:52:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:08,537 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1202 transitions. [2023-07-03 22:52:08,537 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 22:52:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1202 transitions. [2023-07-03 22:52:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:52:08,562 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:08,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:52:08,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:08,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2125730878, now seen corresponding path program 1 times [2023-07-03 22:52:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141200513] [2023-07-03 22:52:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:08,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:52:08,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:52:08,591 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:08,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141200513] [2023-07-03 22:52:08,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141200513] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:08,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:08,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:08,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762425002] [2023-07-03 22:52:08,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:08,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:08,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:08,593 INFO L87 Difference]: Start difference. First operand 520 states and 1202 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 22:52:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:08,782 INFO L93 Difference]: Finished difference Result 858 states and 2072 transitions. [2023-07-03 22:52:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:08,783 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 22:52:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:08,811 INFO L225 Difference]: With dead ends: 858 [2023-07-03 22:52:08,811 INFO L226 Difference]: Without dead ends: 858 [2023-07-03 22:52:08,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 22:52:08,812 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 39 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:08,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 527 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-07-03 22:52:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2023-07-03 22:52:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 574 states have (on average 2.6306620209059233) internal successors, (1510), 574 states have internal predecessors, (1510), 281 states have call successors, (281), 2 states have call predecessors, (281), 2 states have return successors, (281), 281 states have call predecessors, (281), 281 states have call successors, (281) [2023-07-03 22:52:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2072 transitions. [2023-07-03 22:52:08,870 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2072 transitions. Word has length 16 [2023-07-03 22:52:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:08,870 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 2072 transitions. [2023-07-03 22:52:08,870 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 22:52:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2072 transitions. [2023-07-03 22:52:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:52:08,963 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:08,963 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 22:52:08,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:52:08,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:08,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -843880459, now seen corresponding path program 1 times [2023-07-03 22:52:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117568138] [2023-07-03 22:52:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:08,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:08,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:08,983 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 22:52:08,983 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:08,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117568138] [2023-07-03 22:52:08,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117568138] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:08,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114226663] [2023-07-03 22:52:08,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:08,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:08,985 INFO L87 Difference]: Start difference. First operand 858 states and 2072 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 22:52:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:09,326 INFO L93 Difference]: Finished difference Result 1342 states and 3248 transitions. [2023-07-03 22:52:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:09,327 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 22:52:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:09,392 INFO L225 Difference]: With dead ends: 1342 [2023-07-03 22:52:09,393 INFO L226 Difference]: Without dead ends: 1342 [2023-07-03 22:52:09,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 22:52:09,393 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 50 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:09,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 465 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:52:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2023-07-03 22:52:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1264. [2023-07-03 22:52:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 820 states have (on average 2.5902439024390245) internal successors, (2124), 820 states have internal predecessors, (2124), 441 states have call successors, (441), 2 states have call predecessors, (441), 2 states have return successors, (441), 441 states have call predecessors, (441), 441 states have call successors, (441) [2023-07-03 22:52:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3006 transitions. [2023-07-03 22:52:09,501 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3006 transitions. Word has length 19 [2023-07-03 22:52:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:09,502 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 3006 transitions. [2023-07-03 22:52:09,502 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 22:52:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3006 transitions. [2023-07-03 22:52:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:52:09,702 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:09,702 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 22:52:09,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:52:09,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:09,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1149429455, now seen corresponding path program 1 times [2023-07-03 22:52:09,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:09,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671756254] [2023-07-03 22:52:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:09,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:09,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:09,746 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 22:52:09,765 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671756254] [2023-07-03 22:52:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [671756254] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:09,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:09,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840257653] [2023-07-03 22:52:09,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:09,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:09,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:09,766 INFO L87 Difference]: Start difference. First operand 1264 states and 3006 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 22:52:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:10,430 INFO L93 Difference]: Finished difference Result 2044 states and 4978 transitions. [2023-07-03 22:52:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:10,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-07-03 22:52:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:10,728 INFO L225 Difference]: With dead ends: 2044 [2023-07-03 22:52:10,728 INFO L226 Difference]: Without dead ends: 2044 [2023-07-03 22:52:10,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 22:52:10,731 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 38 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:10,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 345 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:52:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2023-07-03 22:52:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1384. [2023-07-03 22:52:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 940 states have (on average 3.1872340425531913) internal successors, (2996), 940 states have internal predecessors, (2996), 441 states have call successors, (441), 2 states have call predecessors, (441), 2 states have return successors, (441), 441 states have call predecessors, (441), 441 states have call successors, (441) [2023-07-03 22:52:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3878 transitions. [2023-07-03 22:52:10,953 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3878 transitions. Word has length 19 [2023-07-03 22:52:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:10,954 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 3878 transitions. [2023-07-03 22:52:10,954 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 22:52:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3878 transitions. [2023-07-03 22:52:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:52:11,256 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:11,256 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 22:52:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:52:11,257 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:11,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2007192452, now seen corresponding path program 1 times [2023-07-03 22:52:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484608505] [2023-07-03 22:52:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:11,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:11,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:11,433 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 22:52:11,433 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484608505] [2023-07-03 22:52:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [484608505] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:11,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109979529] [2023-07-03 22:52:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:11,437 INFO L87 Difference]: Start difference. First operand 1384 states and 3878 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 22:52:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:11,848 INFO L93 Difference]: Finished difference Result 1664 states and 4718 transitions. [2023-07-03 22:52:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:11,848 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 22:52:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:11,955 INFO L225 Difference]: With dead ends: 1664 [2023-07-03 22:52:11,956 INFO L226 Difference]: Without dead ends: 1664 [2023-07-03 22:52:11,956 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 22:52:11,956 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 53 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:11,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 461 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:52:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2023-07-03 22:52:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1604. [2023-07-03 22:52:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1080 states have (on average 3.311111111111111) internal successors, (3576), 1080 states have internal predecessors, (3576), 521 states have call successors, (521), 2 states have call predecessors, (521), 2 states have return successors, (521), 521 states have call predecessors, (521), 521 states have call successors, (521) [2023-07-03 22:52:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4618 transitions. [2023-07-03 22:52:12,146 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4618 transitions. Word has length 27 [2023-07-03 22:52:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 4618 transitions. [2023-07-03 22:52:12,147 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 22:52:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4618 transitions. [2023-07-03 22:52:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:52:12,474 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:12,475 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 22:52:12,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:52:12,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:12,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1304785538, now seen corresponding path program 1 times [2023-07-03 22:52:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561791756] [2023-07-03 22:52:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:12,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:12,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:12,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:52:12,506 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:12,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561791756] [2023-07-03 22:52:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561791756] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:12,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:12,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392162300] [2023-07-03 22:52:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:12,507 INFO L87 Difference]: Start difference. First operand 1604 states and 4618 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 22:52:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:13,040 INFO L93 Difference]: Finished difference Result 2384 states and 5894 transitions. [2023-07-03 22:52:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:52:13,041 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 22:52:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:13,385 INFO L225 Difference]: With dead ends: 2384 [2023-07-03 22:52:13,385 INFO L226 Difference]: Without dead ends: 2384 [2023-07-03 22:52:13,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 22:52:13,386 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 35 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:13,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 528 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:52:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2023-07-03 22:52:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1604. [2023-07-03 22:52:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1080 states have (on average 3.2888888888888888) internal successors, (3552), 1080 states have internal predecessors, (3552), 521 states have call successors, (521), 2 states have call predecessors, (521), 2 states have return successors, (521), 521 states have call predecessors, (521), 521 states have call successors, (521) [2023-07-03 22:52:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4594 transitions. [2023-07-03 22:52:13,653 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4594 transitions. Word has length 25 [2023-07-03 22:52:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:13,654 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 4594 transitions. [2023-07-03 22:52:13,654 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 22:52:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4594 transitions. [2023-07-03 22:52:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:52:13,891 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:13,891 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 22:52:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:52:13,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:13,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1429530512, now seen corresponding path program 1 times [2023-07-03 22:52:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343444049] [2023-07-03 22:52:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:13,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:13,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:52:13,913 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:13,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343444049] [2023-07-03 22:52:13,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [343444049] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:13,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231360569] [2023-07-03 22:52:13,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:13,914 INFO L87 Difference]: Start difference. First operand 1604 states and 4594 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 22:52:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:14,262 INFO L93 Difference]: Finished difference Result 1664 states and 4674 transitions. [2023-07-03 22:52:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:52:14,263 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 22:52:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:14,371 INFO L225 Difference]: With dead ends: 1664 [2023-07-03 22:52:14,371 INFO L226 Difference]: Without dead ends: 1664 [2023-07-03 22:52:14,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 22:52:14,372 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 47 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:14,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 558 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2023-07-03 22:52:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1384. [2023-07-03 22:52:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 940 states have (on average 3.1446808510638298) internal successors, (2956), 940 states have internal predecessors, (2956), 441 states have call successors, (441), 2 states have call predecessors, (441), 2 states have return successors, (441), 441 states have call predecessors, (441), 441 states have call successors, (441) [2023-07-03 22:52:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3838 transitions. [2023-07-03 22:52:14,517 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3838 transitions. Word has length 25 [2023-07-03 22:52:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:14,517 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 3838 transitions. [2023-07-03 22:52:14,518 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 22:52:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3838 transitions. [2023-07-03 22:52:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-07-03 22:52:14,873 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:14,873 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 22:52:14,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:52:14,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:14,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash 627775082, now seen corresponding path program 1 times [2023-07-03 22:52:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:14,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81039580] [2023-07-03 22:52:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:14,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:14,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:14,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:14,928 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 22:52:14,928 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:14,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81039580] [2023-07-03 22:52:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [81039580] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:14,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:14,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591298184] [2023-07-03 22:52:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:14,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:14,929 INFO L87 Difference]: Start difference. First operand 1384 states and 3838 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 22:52:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:15,335 INFO L93 Difference]: Finished difference Result 2104 states and 5434 transitions. [2023-07-03 22:52:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:15,336 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 22:52:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:15,516 INFO L225 Difference]: With dead ends: 2104 [2023-07-03 22:52:15,516 INFO L226 Difference]: Without dead ends: 2104 [2023-07-03 22:52:15,516 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 22:52:15,517 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 44 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:15,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 437 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:52:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2023-07-03 22:52:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1384. [2023-07-03 22:52:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 940 states have (on average 3.1446808510638298) internal successors, (2956), 940 states have internal predecessors, (2956), 441 states have call successors, (441), 2 states have call predecessors, (441), 2 states have return successors, (441), 441 states have call predecessors, (441), 441 states have call successors, (441) [2023-07-03 22:52:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3838 transitions. [2023-07-03 22:52:15,768 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3838 transitions. Word has length 27 [2023-07-03 22:52:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:15,769 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 3838 transitions. [2023-07-03 22:52:15,769 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 22:52:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3838 transitions. [2023-07-03 22:52:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:52:16,025 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:16,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:52:16,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:16,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 486062145, now seen corresponding path program 1 times [2023-07-03 22:52:16,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:16,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542492260] [2023-07-03 22:52:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:16,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:52:16,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:16,047 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 22:52:16,047 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542492260] [2023-07-03 22:52:16,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [542492260] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:52:16,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:52:16,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:52:16,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895932691] [2023-07-03 22:52:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:52:16,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:52:16,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:52:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:52:16,048 INFO L87 Difference]: Start difference. First operand 1384 states and 3838 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 22:52:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:16,484 INFO L93 Difference]: Finished difference Result 1884 states and 5450 transitions. [2023-07-03 22:52:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:52:16,484 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 22:52:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:16,611 INFO L225 Difference]: With dead ends: 1884 [2023-07-03 22:52:16,611 INFO L226 Difference]: Without dead ends: 1884 [2023-07-03 22:52:16,612 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 22:52:16,612 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 61 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:16,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 417 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-07-03 22:52:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2023-07-03 22:52:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1604. [2023-07-03 22:52:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1080 states have (on average 3.3074074074074074) internal successors, (3572), 1080 states have internal predecessors, (3572), 521 states have call successors, (521), 2 states have call predecessors, (521), 2 states have return successors, (521), 521 states have call predecessors, (521), 521 states have call successors, (521) [2023-07-03 22:52:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4614 transitions. [2023-07-03 22:52:16,764 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4614 transitions. Word has length 30 [2023-07-03 22:52:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:16,764 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 4614 transitions. [2023-07-03 22:52:16,764 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 22:52:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4614 transitions. [2023-07-03 22:52:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-07-03 22:52:17,090 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:17,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:17,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:52:17,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:17,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2094453871, now seen corresponding path program 1 times [2023-07-03 22:52:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:17,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172352573] [2023-07-03 22:52:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:17,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:52:17,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:52:17,139 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:17,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172352573] [2023-07-03 22:52:17,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172352573] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:17,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:52:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824294279] [2023-07-03 22:52:17,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:17,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:52:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:52:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:52:17,141 INFO L87 Difference]: Start difference. First operand 1604 states and 4614 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:52:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:19,122 INFO L93 Difference]: Finished difference Result 3637 states and 10492 transitions. [2023-07-03 22:52:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-07-03 22:52:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-07-03 22:52:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:19,965 INFO L225 Difference]: With dead ends: 3637 [2023-07-03 22:52:19,965 INFO L226 Difference]: Without dead ends: 3553 [2023-07-03 22:52:19,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-07-03 22:52:19,966 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 311 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:19,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 551 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-07-03 22:52:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2023-07-03 22:52:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2801. [2023-07-03 22:52:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 1498 states have (on average 3.67890520694259) internal successors, (5511), 1903 states have internal predecessors, (5511), 1299 states have call successors, (1299), 2 states have call predecessors, (1299), 3 states have return successors, (2077), 895 states have call predecessors, (2077), 1299 states have call successors, (2077) [2023-07-03 22:52:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 8887 transitions. [2023-07-03 22:52:21,095 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 8887 transitions. Word has length 30 [2023-07-03 22:52:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:21,095 INFO L495 AbstractCegarLoop]: Abstraction has 2801 states and 8887 transitions. [2023-07-03 22:52:21,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-07-03 22:52:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 8887 transitions. [2023-07-03 22:52:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:52:22,482 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:22,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:22,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:52:22,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:22,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash -317178807, now seen corresponding path program 1 times [2023-07-03 22:52:22,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:22,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90132994] [2023-07-03 22:52:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:22,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:22,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2023-07-03 22:52:22,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-07-03 22:52:22,546 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:22,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90132994] [2023-07-03 22:52:22,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [90132994] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:22,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:22,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-07-03 22:52:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570737641] [2023-07-03 22:52:22,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-07-03 22:52:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-07-03 22:52:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-07-03 22:52:22,547 INFO L87 Difference]: Start difference. First operand 2801 states and 8887 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:52:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:52:32,613 INFO L93 Difference]: Finished difference Result 10140 states and 39652 transitions. [2023-07-03 22:52:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-07-03 22:52:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-07-03 22:52:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:52:40,672 INFO L225 Difference]: With dead ends: 10140 [2023-07-03 22:52:40,673 INFO L226 Difference]: Without dead ends: 10140 [2023-07-03 22:52:40,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-07-03 22:52:40,673 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 167 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-07-03 22:52:40,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1157 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-07-03 22:52:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10140 states. [2023-07-03 22:52:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10140 to 7786. [2023-07-03 22:52:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7786 states, 4229 states have (on average 3.9122724048238355) internal successors, (16545), 5308 states have internal predecessors, (16545), 3553 states have call successors, (3553), 2 states have call predecessors, (3553), 3 states have return successors, (5651), 2475 states have call predecessors, (5651), 3553 states have call successors, (5651) [2023-07-03 22:52:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7786 states to 7786 states and 25749 transitions. [2023-07-03 22:52:49,230 INFO L78 Accepts]: Start accepts. Automaton has 7786 states and 25749 transitions. Word has length 28 [2023-07-03 22:52:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:52:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 7786 states and 25749 transitions. [2023-07-03 22:52:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:52:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7786 states and 25749 transitions. [2023-07-03 22:52:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:52:51,253 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:52:51,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:52:51,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:52:51,253 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:52:51,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:52:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1949642297, now seen corresponding path program 2 times [2023-07-03 22:52:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:52:51,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665471211] [2023-07-03 22:52:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:52:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:52:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:52:51,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2023-07-03 22:52:51,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:52:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:52:51,371 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:52:51,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665471211] [2023-07-03 22:52:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [665471211] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:52:51,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:52:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-07-03 22:52:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243099691] [2023-07-03 22:52:51,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:52:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-07-03 22:52:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:52:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-07-03 22:52:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:52:51,372 INFO L87 Difference]: Start difference. First operand 7786 states and 25749 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)