/usr/bin/java -Xmx15000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/threadmodular/regression/add-sub-positive-k/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-3a8dd60-m [2023-06-12 17:59:01,437 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-06-12 17:59:01,487 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/ThreadModularVerifier.Settings.epf [2023-06-12 17:59:01,498 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-06-12 17:59:01,499 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-06-12 17:59:01,499 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-06-12 17:59:01,500 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-06-12 17:59:01,500 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-06-12 17:59:01,500 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-06-12 17:59:01,504 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-06-12 17:59:01,504 INFO L137 SettingsManager]: * Save file in source directory=true [2023-06-12 17:59:01,505 INFO L137 SettingsManager]: * Use automatic naming=true [2023-06-12 17:59:01,505 INFO L137 SettingsManager]: * File name=CHC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-06-12 17:59:01,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-06-12 17:59:01,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-06-12 17:59:01,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-06-12 17:59:01,706 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-06-12 17:59:01,706 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-06-12 17:59:01,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl [2023-06-12 17:59:01,707 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/add-sub-positive-k.bpl' [2023-06-12 17:59:01,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-06-12 17:59:01,722 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-06-12 17:59:01,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:01,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:01,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:01,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:01,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:01,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:01,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:01,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:01,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 17:59:01,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-06-12 17:59:01,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-06-12 17:59:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-06-12 17:59:01,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-06-12 17:59:01,843 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:01,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:01,847 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-06-12 17:59:01,892 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:01,896 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-06-12 17:59:01,897 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:01,898 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01 BoogieIcfgContainer [2023-06-12 17:59:01,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:01,898 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-06-12 17:59:01,899 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-06-12 17:59:01,899 INFO L274 PluginConnector]: IcfgToChc initialized [2023-06-12 17:59:01,900 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:02,080 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,089 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,092 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,094 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,108 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'havoc k;' is: true [2023-06-12 17:59:02,112 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'havoc k;' is: true [2023-06-12 17:59:02,115 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'havoc k;' is: true [2023-06-12 17:59:02,116 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'havoc k;' is: true [2023-06-12 17:59:02,124 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'assume k >= 0;' is: true [2023-06-12 17:59:02,127 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'assume k >= 0;' is: true [2023-06-12 17:59:02,128 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'assume k >= 0;' is: true [2023-06-12 17:59:02,130 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'assume k >= 0;' is: true [2023-06-12 17:59:02,142 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,162 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,164 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'x := x + k;' is: true [2023-06-12 17:59:02,166 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x + k;' is: true [2023-06-12 17:59:02,173 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,176 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,178 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and 'x := x - k;' is: true [2023-06-12 17:59:02,181 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and 'x := x - k;' is: true [2023-06-12 17:59:02,189 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,191 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,192 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume k >= 0;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,193 INFO L111 IndependenceChecker]: instantiated independence condition for 'havoc k;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,229 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02 HornClauseAST [2023-06-12 17:59:02,229 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-06-12 17:59:02,230 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-06-12 17:59:02,230 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-06-12 17:59:02,230 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-06-12 17:59:02,231 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,231 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/add-sub-positive-k/CHC_add-sub-positive-k.bpl_UID4917693024242150664.smt2 [2023-06-12 17:59:02,250 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-06-12 17:59:02,251 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-06-12 17:59:02,251 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-06-12 17:59:02,251 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-06-12 17:59:02,253 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,272 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02 Unit [2023-06-12 17:59:02,272 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-06-12 17:59:02,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:02,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:02,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,275 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,275 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:02,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:02,298 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:02,298 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:02,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 17:59:02,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-06-12 17:59:02,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-06-12 17:59:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-06-12 17:59:02,313 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-06-12 17:59:02,313 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-06-12 17:59:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-06-12 17:59:02,313 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-06-12 17:59:02,327 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:02,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:02,559 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:02,560 INFO L294 CfgBuilder]: Using library mode [2023-06-12 17:59:02,561 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:02,561 INFO L201 PluginConnector]: Adding new model add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02 BoogieIcfgContainer [2023-06-12 17:59:02,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:02,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-06-12 17:59:02,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-06-12 17:59:02,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-06-12 17:59:02,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/5) ... [2023-06-12 17:59:02,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e195948 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01" (2/5) ... [2023-06-12 17:59:02,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e195948 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (3/5) ... [2023-06-12 17:59:02,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e195948 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (4/5) ... [2023-06-12 17:59:02,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e195948 and model type add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub-positive-k.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02" (5/5) ... [2023-06-12 17:59:02,568 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-06-12 17:59:02,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-06-12 17:59:02,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-06-12 17:59:02,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-06-12 17:59:02,619 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;@5e6fe956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-06-12 17:59:02,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-06-12 17:59:02,622 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) [2023-06-12 17:59:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-06-12 17:59:02,654 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:02,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:02,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:02,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 874916787, now seen corresponding path program 1 times [2023-06-12 17:59:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106172872] [2023-06-12 17:59:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:02,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:02,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:02,809 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106172872] [2023-06-12 17:59:02,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [106172872] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:02,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662503010] [2023-06-12 17:59:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:02,844 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) [2023-06-12 17:59:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:03,232 INFO L93 Difference]: Finished difference Result 218 states and 352 transitions. [2023-06-12 17:59:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-06-12 17:59:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:03,250 INFO L225 Difference]: With dead ends: 218 [2023-06-12 17:59:03,250 INFO L226 Difference]: Without dead ends: 216 [2023-06-12 17:59:03,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:03,255 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 291 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-06-12 17:59:03,259 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] [2023-06-12 17:59:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-06-12 17:59:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-06-12 17:59:03,336 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) [2023-06-12 17:59:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 350 transitions. [2023-06-12 17:59:03,344 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 350 transitions. Word has length 8 [2023-06-12 17:59:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:03,345 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 350 transitions. [2023-06-12 17:59:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 350 transitions. [2023-06-12 17:59:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:03,355 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:03,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-06-12 17:59:03,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:03,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash -499745737, now seen corresponding path program 1 times [2023-06-12 17:59:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44120788] [2023-06-12 17:59:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:03,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:03,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:03,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:03,399 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:03,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44120788] [2023-06-12 17:59:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [44120788] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:03,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:03,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644366634] [2023-06-12 17:59:03,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:03,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:03,403 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) [2023-06-12 17:59:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:03,649 INFO L93 Difference]: Finished difference Result 374 states and 628 transitions. [2023-06-12 17:59:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 17:59:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:03,657 INFO L225 Difference]: With dead ends: 374 [2023-06-12 17:59:03,657 INFO L226 Difference]: Without dead ends: 374 [2023-06-12 17:59:03,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:03,659 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 43 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:03,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 562 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-06-12 17:59:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 338. [2023-06-12 17:59:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 214 states have (on average 1.5233644859813085) internal successors, (326), 214 states have internal predecessors, (326), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-06-12 17:59:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2023-06-12 17:59:03,716 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 10 [2023-06-12 17:59:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:03,716 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2023-06-12 17:59:03,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2023-06-12 17:59:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:03,719 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:03,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:03,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-06-12 17:59:03,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:03,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1126487621, now seen corresponding path program 1 times [2023-06-12 17:59:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475122704] [2023-06-12 17:59:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:03,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:03,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:03,767 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:03,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475122704] [2023-06-12 17:59:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [475122704] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:03,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884979809] [2023-06-12 17:59:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:03,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:03,770 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,028 INFO L93 Difference]: Finished difference Result 472 states and 822 transitions. [2023-06-12 17:59:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 17:59:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,040 INFO L225 Difference]: With dead ends: 472 [2023-06-12 17:59:04,040 INFO L226 Difference]: Without dead ends: 472 [2023-06-12 17:59:04,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:04,042 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 31 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 532 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-06-12 17:59:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 364. [2023-06-12 17:59:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 240 states have (on average 1.6666666666666667) internal successors, (400), 240 states have internal predecessors, (400), 121 states have call successors, (121), 2 states have call predecessors, (121), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2023-06-12 17:59:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 642 transitions. [2023-06-12 17:59:04,085 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 642 transitions. Word has length 10 [2023-06-12 17:59:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,085 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 642 transitions. [2023-06-12 17:59:04,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 642 transitions. [2023-06-12 17:59:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:04,092 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-06-12 17:59:04,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1058531361, now seen corresponding path program 1 times [2023-06-12 17:59:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087268604] [2023-06-12 17:59:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:04,113 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087268604] [2023-06-12 17:59:04,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087268604] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578220716] [2023-06-12 17:59:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,115 INFO L87 Difference]: Start difference. First operand 364 states and 642 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,334 INFO L93 Difference]: Finished difference Result 524 states and 964 transitions. [2023-06-12 17:59:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 17:59:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,344 INFO L225 Difference]: With dead ends: 524 [2023-06-12 17:59:04,345 INFO L226 Difference]: Without dead ends: 524 [2023-06-12 17:59:04,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:04,345 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 45 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 560 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-06-12 17:59:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 488. [2023-06-12 17:59:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 316 states have (on average 1.7911392405063291) internal successors, (566), 316 states have internal predecessors, (566), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-06-12 17:59:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 904 transitions. [2023-06-12 17:59:04,371 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 904 transitions. Word has length 13 [2023-06-12 17:59:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,372 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 904 transitions. [2023-06-12 17:59:04,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 904 transitions. [2023-06-12 17:59:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:04,381 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-06-12 17:59:04,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1470147669, now seen corresponding path program 1 times [2023-06-12 17:59:04,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589860737] [2023-06-12 17:59:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:04,402 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589860737] [2023-06-12 17:59:04,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589860737] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827769860] [2023-06-12 17:59:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,403 INFO L87 Difference]: Start difference. First operand 488 states and 904 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,641 INFO L93 Difference]: Finished difference Result 770 states and 1486 transitions. [2023-06-12 17:59:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 17:59:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,666 INFO L225 Difference]: With dead ends: 770 [2023-06-12 17:59:04,666 INFO L226 Difference]: Without dead ends: 770 [2023-06-12 17:59:04,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:04,667 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 33 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 530 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-06-12 17:59:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 518. [2023-06-12 17:59:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 346 states have (on average 2.1040462427745665) internal successors, (728), 346 states have internal predecessors, (728), 169 states have call successors, (169), 2 states have call predecessors, (169), 2 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2023-06-12 17:59:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1066 transitions. [2023-06-12 17:59:04,711 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1066 transitions. Word has length 13 [2023-06-12 17:59:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,712 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 1066 transitions. [2023-06-12 17:59:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1066 transitions. [2023-06-12 17:59:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:04,730 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-06-12 17:59:04,731 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash 459087399, now seen corresponding path program 1 times [2023-06-12 17:59:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587718488] [2023-06-12 17:59:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:04,785 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587718488] [2023-06-12 17:59:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [587718488] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496999949] [2023-06-12 17:59:04,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,786 INFO L87 Difference]: Start difference. First operand 518 states and 1066 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,999 INFO L93 Difference]: Finished difference Result 680 states and 1438 transitions. [2023-06-12 17:59:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 17:59:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,017 INFO L225 Difference]: With dead ends: 680 [2023-06-12 17:59:05,017 INFO L226 Difference]: Without dead ends: 680 [2023-06-12 17:59:05,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:05,018 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 47 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 558 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-06-12 17:59:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 644. [2023-06-12 17:59:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 424 states have (on average 2.2264150943396226) internal successors, (944), 424 states have internal predecessors, (944), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-06-12 17:59:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1378 transitions. [2023-06-12 17:59:05,060 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1378 transitions. Word has length 16 [2023-06-12 17:59:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,061 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1378 transitions. [2023-06-12 17:59:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1378 transitions. [2023-06-12 17:59:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:05,087 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-06-12 17:59:05,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -106265135, now seen corresponding path program 1 times [2023-06-12 17:59:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148150260] [2023-06-12 17:59:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:05,107 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148150260] [2023-06-12 17:59:05,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148150260] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558774306] [2023-06-12 17:59:05,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,109 INFO L87 Difference]: Start difference. First operand 644 states and 1378 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,395 INFO L93 Difference]: Finished difference Result 1000 states and 2134 transitions. [2023-06-12 17:59:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 17:59:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,428 INFO L225 Difference]: With dead ends: 1000 [2023-06-12 17:59:05,428 INFO L226 Difference]: Without dead ends: 1000 [2023-06-12 17:59:05,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:05,429 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 35 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 528 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-06-12 17:59:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 676. [2023-06-12 17:59:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 456 states have (on average 2.543859649122807) internal successors, (1160), 456 states have internal predecessors, (1160), 217 states have call successors, (217), 2 states have call predecessors, (217), 2 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-06-12 17:59:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1594 transitions. [2023-06-12 17:59:05,480 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1594 transitions. Word has length 16 [2023-06-12 17:59:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,481 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1594 transitions. [2023-06-12 17:59:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1594 transitions. [2023-06-12 17:59:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:05,518 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-06-12 17:59:05,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1972636312, now seen corresponding path program 1 times [2023-06-12 17:59:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746163854] [2023-06-12 17:59:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:05,544 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746163854] [2023-06-12 17:59:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746163854] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095953068] [2023-06-12 17:59:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,545 INFO L87 Difference]: Start difference. First operand 676 states and 1594 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,772 INFO L93 Difference]: Finished difference Result 840 states and 2022 transitions. [2023-06-12 17:59:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 17:59:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,794 INFO L225 Difference]: With dead ends: 840 [2023-06-12 17:59:05,794 INFO L226 Difference]: Without dead ends: 840 [2023-06-12 17:59:05,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:05,795 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 49 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 556 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-06-12 17:59:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 804. [2023-06-12 17:59:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 536 states have (on average 2.671641791044776) internal successors, (1432), 536 states have internal predecessors, (1432), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-06-12 17:59:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1962 transitions. [2023-06-12 17:59:05,837 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1962 transitions. Word has length 19 [2023-06-12 17:59:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,837 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1962 transitions. [2023-06-12 17:59:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1962 transitions. [2023-06-12 17:59:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:05,892 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-06-12 17:59:05,893 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1408467446, now seen corresponding path program 1 times [2023-06-12 17:59:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16341895] [2023-06-12 17:59:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:05,912 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16341895] [2023-06-12 17:59:05,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [16341895] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948992627] [2023-06-12 17:59:05,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,913 INFO L87 Difference]: Start difference. First operand 804 states and 1962 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,201 INFO L93 Difference]: Finished difference Result 1234 states and 2898 transitions. [2023-06-12 17:59:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 17:59:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,255 INFO L225 Difference]: With dead ends: 1234 [2023-06-12 17:59:06,256 INFO L226 Difference]: Without dead ends: 1234 [2023-06-12 17:59:06,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,256 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 37 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:06,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 526 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2023-06-12 17:59:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 838. [2023-06-12 17:59:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 570 states have (on average 2.9964912280701754) internal successors, (1708), 570 states have internal predecessors, (1708), 265 states have call successors, (265), 2 states have call predecessors, (265), 2 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2023-06-12 17:59:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2238 transitions. [2023-06-12 17:59:06,335 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2238 transitions. Word has length 19 [2023-06-12 17:59:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:06,335 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 2238 transitions. [2023-06-12 17:59:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2238 transitions. [2023-06-12 17:59:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:06,407 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:06,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-06-12 17:59:06,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:06,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2114387954, now seen corresponding path program 1 times [2023-06-12 17:59:06,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:06,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134285206] [2023-06-12 17:59:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:06,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:06,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:06,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:06,428 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134285206] [2023-06-12 17:59:06,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134285206] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:06,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:06,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339053712] [2023-06-12 17:59:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:06,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:06,429 INFO L87 Difference]: Start difference. First operand 838 states and 2238 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,653 INFO L93 Difference]: Finished difference Result 1004 states and 2728 transitions. [2023-06-12 17:59:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 17:59:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,687 INFO L225 Difference]: With dead ends: 1004 [2023-06-12 17:59:06,688 INFO L226 Difference]: Without dead ends: 1004 [2023-06-12 17:59:06,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,688 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 51 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-06-12 17:59:06,689 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] [2023-06-12 17:59:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-06-12 17:59:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 968. [2023-06-12 17:59:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 652 states have (on average 3.1319018404907975) internal successors, (2042), 652 states have internal predecessors, (2042), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-06-12 17:59:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2668 transitions. [2023-06-12 17:59:06,745 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2668 transitions. Word has length 22 [2023-06-12 17:59:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:06,745 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 2668 transitions. [2023-06-12 17:59:06,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2668 transitions. [2023-06-12 17:59:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:06,882 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:06,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-06-12 17:59:06,882 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:06,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -85300501, now seen corresponding path program 1 times [2023-06-12 17:59:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722458211] [2023-06-12 17:59:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:06,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:06,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:06,921 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:06,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722458211] [2023-06-12 17:59:06,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [722458211] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:06,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661247559] [2023-06-12 17:59:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:06,922 INFO L87 Difference]: Start difference. First operand 968 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,198 INFO L93 Difference]: Finished difference Result 1472 states and 3790 transitions. [2023-06-12 17:59:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 17:59:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:07,276 INFO L225 Difference]: With dead ends: 1472 [2023-06-12 17:59:07,276 INFO L226 Difference]: Without dead ends: 1472 [2023-06-12 17:59:07,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:07,276 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 [2023-06-12 17:59:07,277 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] [2023-06-12 17:59:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-06-12 17:59:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1004. [2023-06-12 17:59:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 688 states have (on average 3.4651162790697674) internal successors, (2384), 688 states have internal predecessors, (2384), 313 states have call successors, (313), 2 states have call predecessors, (313), 2 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-06-12 17:59:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3010 transitions. [2023-06-12 17:59:07,365 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3010 transitions. Word has length 22 [2023-06-12 17:59:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:07,365 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 3010 transitions. [2023-06-12 17:59:07,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3010 transitions. [2023-06-12 17:59:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:07,478 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:07,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:07,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-06-12 17:59:07,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:07,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1280717697, now seen corresponding path program 1 times [2023-06-12 17:59:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:07,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274332501] [2023-06-12 17:59:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:07,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:07,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:07,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:07,505 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274332501] [2023-06-12 17:59:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [274332501] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:07,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:07,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:07,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889774831] [2023-06-12 17:59:07,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:07,506 INFO L87 Difference]: Start difference. First operand 1004 states and 3010 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,847 INFO L93 Difference]: Finished difference Result 1170 states and 3518 transitions. [2023-06-12 17:59:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:07,894 INFO L225 Difference]: With dead ends: 1170 [2023-06-12 17:59:07,895 INFO L226 Difference]: Without dead ends: 1170 [2023-06-12 17:59:07,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:07,895 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 [2023-06-12 17:59:07,895 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] [2023-06-12 17:59:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2023-06-12 17:59:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1134. [2023-06-12 17:59:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 770 states have (on average 3.553246753246753) internal successors, (2736), 770 states have internal predecessors, (2736), 361 states have call successors, (361), 2 states have call predecessors, (361), 2 states have return successors, (361), 361 states have call predecessors, (361), 361 states have call successors, (361) [2023-06-12 17:59:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3458 transitions. [2023-06-12 17:59:07,974 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3458 transitions. Word has length 27 [2023-06-12 17:59:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:07,974 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 3458 transitions. [2023-06-12 17:59:07,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3458 transitions. [2023-06-12 17:59:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:08,103 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:08,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:08,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-06-12 17:59:08,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:08,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2064997264, now seen corresponding path program 1 times [2023-06-12 17:59:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:08,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719830236] [2023-06-12 17:59:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:08,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:08,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:08,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:08,121 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:08,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719830236] [2023-06-12 17:59:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [719830236] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:08,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:08,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720276950] [2023-06-12 17:59:08,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:08,122 INFO L87 Difference]: Start difference. First operand 1134 states and 3458 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:08,367 INFO L93 Difference]: Finished difference Result 1302 states and 4016 transitions. [2023-06-12 17:59:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-06-12 17:59:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:08,423 INFO L225 Difference]: With dead ends: 1302 [2023-06-12 17:59:08,424 INFO L226 Difference]: Without dead ends: 1302 [2023-06-12 17:59:08,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:08,424 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 53 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-06-12 17:59:08,425 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] [2023-06-12 17:59:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2023-06-12 17:59:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1136. [2023-06-12 17:59:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 772 states have (on average 3.6088082901554404) internal successors, (2786), 772 states have internal predecessors, (2786), 361 states have call successors, (361), 2 states have call predecessors, (361), 2 states have return successors, (361), 361 states have call predecessors, (361), 361 states have call successors, (361) [2023-06-12 17:59:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3508 transitions. [2023-06-12 17:59:08,521 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3508 transitions. Word has length 25 [2023-06-12 17:59:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:08,522 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 3508 transitions. [2023-06-12 17:59:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3508 transitions. [2023-06-12 17:59:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:08,673 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:08,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:08,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-06-12 17:59:08,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:08,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1075949671, now seen corresponding path program 1 times [2023-06-12 17:59:08,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:08,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094489631] [2023-06-12 17:59:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:08,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-06-12 17:59:08,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:08,712 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094489631] [2023-06-12 17:59:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094489631] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:08,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-06-12 17:59:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660818151] [2023-06-12 17:59:08,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-06-12 17:59:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-06-12 17:59:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-06-12 17:59:08,713 INFO L87 Difference]: Start difference. First operand 1136 states and 3508 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:10,294 INFO L93 Difference]: Finished difference Result 3215 states and 10635 transitions. [2023-06-12 17:59:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 17:59:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-06-12 17:59:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:10,891 INFO L225 Difference]: With dead ends: 3215 [2023-06-12 17:59:10,891 INFO L226 Difference]: Without dead ends: 3214 [2023-06-12 17:59:10,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-06-12 17:59:10,891 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 413 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:10,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 613 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 17:59:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2023-06-12 17:59:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2678. [2023-06-12 17:59:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1809 states have (on average 3.632946379215036) internal successors, (6572), 1810 states have internal predecessors, (6572), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-06-12 17:59:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 9114 transitions. [2023-06-12 17:59:11,638 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 9114 transitions. Word has length 27 [2023-06-12 17:59:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:11,638 INFO L495 AbstractCegarLoop]: Abstraction has 2678 states and 9114 transitions. [2023-06-12 17:59:11,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 9114 transitions. [2023-06-12 17:59:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:12,089 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:12,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-06-12 17:59:12,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:12,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1514376571, now seen corresponding path program 1 times [2023-06-12 17:59:12,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:12,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126885731] [2023-06-12 17:59:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:12,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:12,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:12,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:12,116 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126885731] [2023-06-12 17:59:12,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126885731] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:12,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:12,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737559843] [2023-06-12 17:59:12,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:12,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:12,118 INFO L87 Difference]: Start difference. First operand 2678 states and 9114 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:13,052 INFO L93 Difference]: Finished difference Result 3508 states and 11436 transitions. [2023-06-12 17:59:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:13,767 INFO L225 Difference]: With dead ends: 3508 [2023-06-12 17:59:13,767 INFO L226 Difference]: Without dead ends: 3508 [2023-06-12 17:59:13,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:13,768 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 34 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:13,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 477 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2023-06-12 17:59:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2678. [2023-06-12 17:59:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1809 states have (on average 3.632946379215036) internal successors, (6572), 1810 states have internal predecessors, (6572), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-06-12 17:59:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 9114 transitions. [2023-06-12 17:59:14,568 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 9114 transitions. Word has length 27 [2023-06-12 17:59:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:14,569 INFO L495 AbstractCegarLoop]: Abstraction has 2678 states and 9114 transitions. [2023-06-12 17:59:14,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 9114 transitions. [2023-06-12 17:59:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:15,053 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:15,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-06-12 17:59:15,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:15,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1469195449, now seen corresponding path program 1 times [2023-06-12 17:59:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:15,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20712363] [2023-06-12 17:59:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:15,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:15,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:15,074 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:15,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20712363] [2023-06-12 17:59:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [20712363] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:15,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344388813] [2023-06-12 17:59:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:15,075 INFO L87 Difference]: Start difference. First operand 2678 states and 9114 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:16,362 INFO L93 Difference]: Finished difference Result 4131 states and 13708 transitions. [2023-06-12 17:59:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:17,464 INFO L225 Difference]: With dead ends: 4131 [2023-06-12 17:59:17,465 INFO L226 Difference]: Without dead ends: 4131 [2023-06-12 17:59:17,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:17,466 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 54 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:17,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 397 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 17:59:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2023-06-12 17:59:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2779. [2023-06-12 17:59:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1910 states have (on average 4.019895287958115) internal successors, (7678), 1911 states have internal predecessors, (7678), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-06-12 17:59:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 10220 transitions. [2023-06-12 17:59:18,543 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 10220 transitions. Word has length 27 [2023-06-12 17:59:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:18,548 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 10220 transitions. [2023-06-12 17:59:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 10220 transitions. [2023-06-12 17:59:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:18,932 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:18,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-06-12 17:59:18,932 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:18,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1507467851, now seen corresponding path program 1 times [2023-06-12 17:59:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:18,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324606849] [2023-06-12 17:59:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:18,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:18,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:18,950 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324606849] [2023-06-12 17:59:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [324606849] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:18,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:18,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077265218] [2023-06-12 17:59:18,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:18,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:18,951 INFO L87 Difference]: Start difference. First operand 2779 states and 10220 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:20,166 INFO L93 Difference]: Finished difference Result 4232 states and 14814 transitions. [2023-06-12 17:59:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-06-12 17:59:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:21,298 INFO L225 Difference]: With dead ends: 4232 [2023-06-12 17:59:21,298 INFO L226 Difference]: Without dead ends: 4232 [2023-06-12 17:59:21,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:21,299 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 41 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:21,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 369 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2023-06-12 17:59:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 2779. [2023-06-12 17:59:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1910 states have (on average 4.019895287958115) internal successors, (7678), 1911 states have internal predecessors, (7678), 865 states have call successors, (865), 2 states have call predecessors, (865), 3 states have return successors, (1677), 865 states have call predecessors, (1677), 865 states have call successors, (1677) [2023-06-12 17:59:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 10220 transitions. [2023-06-12 17:59:22,246 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 10220 transitions. Word has length 25 [2023-06-12 17:59:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:22,246 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 10220 transitions. [2023-06-12 17:59:22,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 10220 transitions. [2023-06-12 17:59:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 17:59:23,237 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:23,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-06-12 17:59:23,238 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:23,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash -278089621, now seen corresponding path program 1 times [2023-06-12 17:59:23,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:23,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868607843] [2023-06-12 17:59:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:23,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:23,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:23,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-06-12 17:59:23,265 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:23,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868607843] [2023-06-12 17:59:23,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868607843] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:23,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662860362] [2023-06-12 17:59:23,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:23,266 INFO L87 Difference]: Start difference. First operand 2779 states and 10220 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:25,717 INFO L93 Difference]: Finished difference Result 4565 states and 19108 transitions. [2023-06-12 17:59:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-06-12 17:59:25,717 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 [2023-06-12 17:59:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:27,031 INFO L225 Difference]: With dead ends: 4565 [2023-06-12 17:59:27,031 INFO L226 Difference]: Without dead ends: 4565 [2023-06-12 17:59:27,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-06-12 17:59:27,032 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 353 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:27,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 418 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 17:59:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2023-06-12 17:59:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 4217. [2023-06-12 17:59:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4217 states, 2860 states have (on average 4.001398601398601) internal successors, (11444), 2901 states have internal predecessors, (11444), 1351 states have call successors, (1351), 2 states have call predecessors, (1351), 5 states have return successors, (5167), 1313 states have call predecessors, (5167), 1351 states have call successors, (5167) [2023-06-12 17:59:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4217 states to 4217 states and 17962 transitions. [2023-06-12 17:59:29,031 INFO L78 Accepts]: Start accepts. Automaton has 4217 states and 17962 transitions. Word has length 30 [2023-06-12 17:59:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:29,031 INFO L495 AbstractCegarLoop]: Abstraction has 4217 states and 17962 transitions. [2023-06-12 17:59:29,032 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) [2023-06-12 17:59:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4217 states and 17962 transitions. [2023-06-12 17:59:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 17:59:30,252 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:30,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:30,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-06-12 17:59:30,252 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:30,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1207497967, now seen corresponding path program 1 times [2023-06-12 17:59:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192431655] [2023-06-12 17:59:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:30,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:30,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:30,288 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:30,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192431655] [2023-06-12 17:59:30,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [192431655] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:30,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:30,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608672124] [2023-06-12 17:59:30,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:30,289 INFO L87 Difference]: Start difference. First operand 4217 states and 17962 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:32,641 INFO L93 Difference]: Finished difference Result 4631 states and 19186 transitions. [2023-06-12 17:59:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 17:59:32,641 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 [2023-06-12 17:59:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:34,053 INFO L225 Difference]: With dead ends: 4631 [2023-06-12 17:59:34,054 INFO L226 Difference]: Without dead ends: 4631 [2023-06-12 17:59:34,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 17:59:34,054 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 336 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:34,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 447 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 17:59:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2023-06-12 17:59:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4235. [2023-06-12 17:59:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 2860 states have (on average 4.001398601398601) internal successors, (11444), 2919 states have internal predecessors, (11444), 1369 states have call successors, (1369), 2 states have call predecessors, (1369), 5 states have return successors, (5083), 1313 states have call predecessors, (5083), 1369 states have call successors, (5083) [2023-06-12 17:59:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 17896 transitions. [2023-06-12 17:59:35,896 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 17896 transitions. Word has length 30 [2023-06-12 17:59:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:35,897 INFO L495 AbstractCegarLoop]: Abstraction has 4235 states and 17896 transitions. [2023-06-12 17:59:35,897 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) [2023-06-12 17:59:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 17896 transitions. [2023-06-12 17:59:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 17:59:37,431 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:37,431 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] [2023-06-12 17:59:37,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-06-12 17:59:37,432 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:37,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 833545500, now seen corresponding path program 1 times [2023-06-12 17:59:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897194205] [2023-06-12 17:59:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:37,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-06-12 17:59:37,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 17:59:37,477 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897194205] [2023-06-12 17:59:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [897194205] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:37,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520330384] [2023-06-12 17:59:37,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:37,478 INFO L87 Difference]: Start difference. First operand 4235 states and 17896 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:39,950 INFO L93 Difference]: Finished difference Result 6187 states and 25596 transitions. [2023-06-12 17:59:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-06-12 17:59:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-06-12 17:59:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:42,350 INFO L225 Difference]: With dead ends: 6187 [2023-06-12 17:59:42,350 INFO L226 Difference]: Without dead ends: 6187 [2023-06-12 17:59:42,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-06-12 17:59:42,351 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 86 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:42,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 637 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2023-06-12 17:59:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 5539. [2023-06-12 17:59:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 3754 states have (on average 4.0580713905167825) internal successors, (15234), 3827 states have internal predecessors, (15234), 1779 states have call successors, (1779), 2 states have call predecessors, (1779), 5 states have return successors, (6505), 1709 states have call predecessors, (6505), 1779 states have call successors, (6505) [2023-06-12 17:59:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 23518 transitions. [2023-06-12 17:59:45,603 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 23518 transitions. Word has length 28 [2023-06-12 17:59:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:45,604 INFO L495 AbstractCegarLoop]: Abstraction has 5539 states and 23518 transitions. [2023-06-12 17:59:45,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 23518 transitions. [2023-06-12 17:59:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 17:59:47,796 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:47,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:47,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-06-12 17:59:47,796 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:47,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1437858919, now seen corresponding path program 1 times [2023-06-12 17:59:47,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:47,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428748479] [2023-06-12 17:59:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:47,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:47,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:47,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:47,821 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:47,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428748479] [2023-06-12 17:59:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428748479] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:47,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807728659] [2023-06-12 17:59:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:47,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:47,823 INFO L87 Difference]: Start difference. First operand 5539 states and 23518 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:52,894 INFO L93 Difference]: Finished difference Result 8215 states and 34660 transitions. [2023-06-12 17:59:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-06-12 17:59:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:58,579 INFO L225 Difference]: With dead ends: 8215 [2023-06-12 17:59:58,580 INFO L226 Difference]: Without dead ends: 8215 [2023-06-12 17:59:58,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:58,580 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 39 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:58,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 457 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 17:59:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8215 states. [2023-06-12 18:00:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8215 to 5539. [2023-06-12 18:00:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 3754 states have (on average 4.0580713905167825) internal successors, (15234), 3827 states have internal predecessors, (15234), 1779 states have call successors, (1779), 2 states have call predecessors, (1779), 5 states have return successors, (6505), 1709 states have call predecessors, (6505), 1779 states have call successors, (6505) [2023-06-12 18:00:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 23518 transitions. [2023-06-12 18:00:02,947 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 23518 transitions. Word has length 30 [2023-06-12 18:00:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:02,947 INFO L495 AbstractCegarLoop]: Abstraction has 5539 states and 23518 transitions. [2023-06-12 18:00:02,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 23518 transitions. [2023-06-12 18:00:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-06-12 18:00:05,180 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:05,180 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] [2023-06-12 18:00:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-06-12 18:00:05,180 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:05,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash 474578921, now seen corresponding path program 1 times [2023-06-12 18:00:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:05,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193576812] [2023-06-12 18:00:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:05,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-06-12 18:00:05,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 18:00:05,235 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193576812] [2023-06-12 18:00:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [193576812] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:00:05,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:00:05,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:00:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075795264] [2023-06-12 18:00:05,235 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:00:05,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:00:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:00:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:00:05,236 INFO L87 Difference]: Start difference. First operand 5539 states and 23518 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:00:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:09,374 INFO L93 Difference]: Finished difference Result 8401 states and 34790 transitions. [2023-06-12 18:00:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-06-12 18:00:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-06-12 18:00:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:13,703 INFO L225 Difference]: With dead ends: 8401 [2023-06-12 18:00:13,704 INFO L226 Difference]: Without dead ends: 8401 [2023-06-12 18:00:13,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-06-12 18:00:13,708 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 78 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:13,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 630 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 18:00:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2023-06-12 18:00:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 7315. [2023-06-12 18:00:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 4996 states have (on average 4.120896717373899) internal successors, (20588), 5091 states have internal predecessors, (20588), 2313 states have call successors, (2313), 2 states have call predecessors, (2313), 5 states have return successors, (8351), 2221 states have call predecessors, (8351), 2313 states have call successors, (8351) [2023-06-12 18:00:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 31252 transitions. [2023-06-12 18:00:18,596 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 31252 transitions. Word has length 28 [2023-06-12 18:00:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:18,596 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 31252 transitions. [2023-06-12 18:00:18,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:00:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 31252 transitions. [2023-06-12 18:00:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:00:21,375 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:21,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:00:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-06-12 18:00:21,375 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:21,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1712803812, now seen corresponding path program 1 times [2023-06-12 18:00:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:21,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559777493] [2023-06-12 18:00:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:21,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:00:21,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:00:21,413 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559777493] [2023-06-12 18:00:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [559777493] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:00:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:00:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:00:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487120859] [2023-06-12 18:00:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:00:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:00:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:00:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:00:21,414 INFO L87 Difference]: Start difference. First operand 7315 states and 31252 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:29,683 INFO L93 Difference]: Finished difference Result 10689 states and 46146 transitions. [2023-06-12 18:00:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:00:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-06-12 18:00:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:39,509 INFO L225 Difference]: With dead ends: 10689 [2023-06-12 18:00:39,510 INFO L226 Difference]: Without dead ends: 10689 [2023-06-12 18:00:39,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:00:39,510 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 44 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:39,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 437 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:00:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2023-06-12 18:00:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 7315. [2023-06-12 18:00:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 4996 states have (on average 4.120896717373899) internal successors, (20588), 5091 states have internal predecessors, (20588), 2313 states have call successors, (2313), 2 states have call predecessors, (2313), 5 states have return successors, (8351), 2221 states have call predecessors, (8351), 2313 states have call successors, (8351) [2023-06-12 18:00:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 31252 transitions. [2023-06-12 18:00:46,485 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 31252 transitions. Word has length 30 [2023-06-12 18:00:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:46,486 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 31252 transitions. [2023-06-12 18:00:46,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 31252 transitions. [2023-06-12 18:00:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:00:49,633 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:49,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:00:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-06-12 18:00:49,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:49,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -98297135, now seen corresponding path program 1 times [2023-06-12 18:00:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:49,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786470306] [2023-06-12 18:00:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:49,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:00:49,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:00:49,657 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:49,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786470306] [2023-06-12 18:00:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786470306] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:00:49,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:00:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:00:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085037411] [2023-06-12 18:00:49,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:00:49,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:00:49,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:00:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:00:49,658 INFO L87 Difference]: Start difference. First operand 7315 states and 31252 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:53,584 INFO L93 Difference]: Finished difference Result 8337 states and 35892 transitions. [2023-06-12 18:00:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:00:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-06-12 18:00:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:57,907 INFO L225 Difference]: With dead ends: 8337 [2023-06-12 18:00:57,908 INFO L226 Difference]: Without dead ends: 8337 [2023-06-12 18:00:57,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:00:57,908 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 49 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 483 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:00:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2023-06-12 18:01:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 7591. [2023-06-12 18:01:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7591 states, 5176 states have (on average 4.145285935085008) internal successors, (21456), 5271 states have internal predecessors, (21456), 2409 states have call successors, (2409), 2 states have call predecessors, (2409), 5 states have return successors, (8735), 2317 states have call predecessors, (8735), 2409 states have call successors, (8735) [2023-06-12 18:01:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7591 states to 7591 states and 32600 transitions. [2023-06-12 18:01:02,923 INFO L78 Accepts]: Start accepts. Automaton has 7591 states and 32600 transitions. Word has length 30 [2023-06-12 18:01:02,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:02,923 INFO L495 AbstractCegarLoop]: Abstraction has 7591 states and 32600 transitions. [2023-06-12 18:01:02,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 7591 states and 32600 transitions. [2023-06-12 18:01:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:01:05,676 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:05,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-06-12 18:01:05,676 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:05,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -871314187, now seen corresponding path program 1 times [2023-06-12 18:01:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637119864] [2023-06-12 18:01:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:05,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:05,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:01:05,699 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637119864] [2023-06-12 18:01:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637119864] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:05,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269181424] [2023-06-12 18:01:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:05,700 INFO L87 Difference]: Start difference. First operand 7591 states and 32600 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:11,012 INFO L93 Difference]: Finished difference Result 8867 states and 38450 transitions. [2023-06-12 18:01:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:11,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-06-12 18:01:11,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:15,855 INFO L225 Difference]: With dead ends: 8867 [2023-06-12 18:01:15,855 INFO L226 Difference]: Without dead ends: 8867 [2023-06-12 18:01:15,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:01:15,856 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 53 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:15,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 461 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:01:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2023-06-12 18:01:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 7591. [2023-06-12 18:01:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7591 states, 5176 states have (on average 4.145285935085008) internal successors, (21456), 5271 states have internal predecessors, (21456), 2409 states have call successors, (2409), 2 states have call predecessors, (2409), 5 states have return successors, (8735), 2317 states have call predecessors, (8735), 2409 states have call successors, (8735) [2023-06-12 18:01:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7591 states to 7591 states and 32600 transitions. [2023-06-12 18:01:21,180 INFO L78 Accepts]: Start accepts. Automaton has 7591 states and 32600 transitions. Word has length 30 [2023-06-12 18:01:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:21,180 INFO L495 AbstractCegarLoop]: Abstraction has 7591 states and 32600 transitions. [2023-06-12 18:01:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:01:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7591 states and 32600 transitions. [2023-06-12 18:01:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:01:26,485 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:26,485 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, 1, 1, 1] [2023-06-12 18:01:26,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-06-12 18:01:26,485 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:26,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1064422313, now seen corresponding path program 1 times [2023-06-12 18:01:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404908713] [2023-06-12 18:01:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:26,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:01:26,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 18:01:26,523 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:26,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404908713] [2023-06-12 18:01:26,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404908713] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:01:26,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:01:26,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:01:26,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694726366] [2023-06-12 18:01:26,524 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:01:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:01:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:01:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:01:26,525 INFO L87 Difference]: Start difference. First operand 7591 states and 32600 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:01:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:31,562 INFO L93 Difference]: Finished difference Result 8641 states and 36520 transitions. [2023-06-12 18:01:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:01:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 33 [2023-06-12 18:01:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:01:36,076 INFO L225 Difference]: With dead ends: 8641 [2023-06-12 18:01:36,077 INFO L226 Difference]: Without dead ends: 8641 [2023-06-12 18:01:36,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:01:36,077 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 340 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:01:36,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 452 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-06-12 18:01:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8641 states. [2023-06-12 18:01:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8641 to 8129. [2023-06-12 18:01:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8129 states, 5514 states have (on average 4.174827711280377) internal successors, (23020), 5617 states have internal predecessors, (23020), 2609 states have call successors, (2609), 2 states have call predecessors, (2609), 5 states have return successors, (9263), 2509 states have call predecessors, (9263), 2609 states have call successors, (9263) [2023-06-12 18:01:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8129 states to 8129 states and 34892 transitions. [2023-06-12 18:01:41,745 INFO L78 Accepts]: Start accepts. Automaton has 8129 states and 34892 transitions. Word has length 33 [2023-06-12 18:01:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:41,745 INFO L495 AbstractCegarLoop]: Abstraction has 8129 states and 34892 transitions. [2023-06-12 18:01:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:01:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8129 states and 34892 transitions. [2023-06-12 18:01:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-06-12 18:01:47,541 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:01:47,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:01:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-06-12 18:01:47,542 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:01:47,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:01:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 360178397, now seen corresponding path program 2 times [2023-06-12 18:01:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:01:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993405995] [2023-06-12 18:01:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:01:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:01:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:01:47,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:01:47,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:01:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-06-12 18:01:47,565 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:01:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993405995] [2023-06-12 18:01:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993405995] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:01:47,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:01:47,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:01:47,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037053877] [2023-06-12 18:01:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:01:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:01:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:01:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:01:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:01:47,567 INFO L87 Difference]: Start difference. First operand 8129 states and 34892 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:01:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:01:54,810 INFO L93 Difference]: Finished difference Result 10867 states and 47071 transitions. [2023-06-12 18:01:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:01:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 31 [2023-06-12 18:01:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:01,946 INFO L225 Difference]: With dead ends: 10867 [2023-06-12 18:02:01,947 INFO L226 Difference]: Without dead ends: 10867 [2023-06-12 18:02:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:02:01,947 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 [2023-06-12 18:02:01,947 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] [2023-06-12 18:02:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2023-06-12 18:02:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10477. [2023-06-12 18:02:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10477 states, 6982 states have (on average 4.131337725580063) internal successors, (28845), 7085 states have internal predecessors, (28845), 3489 states have call successors, (3489), 2 states have call predecessors, (3489), 5 states have return successors, (12639), 3389 states have call predecessors, (12639), 3489 states have call successors, (12639) [2023-06-12 18:02:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10477 states to 10477 states and 44973 transitions. [2023-06-12 18:02:11,902 INFO L78 Accepts]: Start accepts. Automaton has 10477 states and 44973 transitions. Word has length 31 [2023-06-12 18:02:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:02:11,902 INFO L495 AbstractCegarLoop]: Abstraction has 10477 states and 44973 transitions. [2023-06-12 18:02:11,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:02:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10477 states and 44973 transitions. [2023-06-12 18:02:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-06-12 18:02:18,909 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:02:18,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:02:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-06-12 18:02:18,909 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:02:18,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:02:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1325260202, now seen corresponding path program 3 times [2023-06-12 18:02:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:02:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965557] [2023-06-12 18:02:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:02:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:02:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:02:18,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:02:18,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:02:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-06-12 18:02:18,927 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:02:18,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965557] [2023-06-12 18:02:18,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965557] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:02:18,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:02:18,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:02:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062515872] [2023-06-12 18:02:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:02:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:02:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:02:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:02:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:02:18,928 INFO L87 Difference]: Start difference. First operand 10477 states and 44973 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:02:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:02:26,052 INFO L93 Difference]: Finished difference Result 10745 states and 45585 transitions. [2023-06-12 18:02:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:02:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 31 [2023-06-12 18:02:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:02:33,578 INFO L225 Difference]: With dead ends: 10745 [2023-06-12 18:02:33,579 INFO L226 Difference]: Without dead ends: 10745 [2023-06-12 18:02:33,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:02:33,579 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 52 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 18:02:33,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 463 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 18:02:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2023-06-12 18:02:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10407. [2023-06-12 18:02:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10407 states, 6912 states have (on average 4.059751157407407) internal successors, (28061), 7015 states have internal predecessors, (28061), 3489 states have call successors, (3489), 2 states have call predecessors, (3489), 5 states have return successors, (12639), 3389 states have call predecessors, (12639), 3489 states have call successors, (12639) [2023-06-12 18:02:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 44189 transitions. [2023-06-12 18:02:44,675 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 44189 transitions. Word has length 31 [2023-06-12 18:02:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:02:44,675 INFO L495 AbstractCegarLoop]: Abstraction has 10407 states and 44189 transitions. [2023-06-12 18:02:44,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:02:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 44189 transitions. [2023-06-12 18:02:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:02:52,565 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:02:52,565 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, 1, 1, 1] [2023-06-12 18:02:52,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-06-12 18:02:52,567 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:02:52,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:02:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1647670772, now seen corresponding path program 1 times [2023-06-12 18:02:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:02:52,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976163897] [2023-06-12 18:02:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:02:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:02:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:02:52,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-06-12 18:02:52,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:02:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 18:02:52,652 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:02:52,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976163897] [2023-06-12 18:02:52,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [976163897] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:02:52,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:02:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:02:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383483861] [2023-06-12 18:02:52,652 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:02:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:02:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:02:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:02:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:02:52,653 INFO L87 Difference]: Start difference. First operand 10407 states and 44189 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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)