/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/numbered-array/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-3a8dd60-m [2023-06-12 18:02:59,001 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-06-12 18:02:59,065 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/ThreadModularVerifier.Settings.epf [2023-06-12 18:02:59,071 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-06-12 18:02:59,072 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-06-12 18:02:59,073 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-06-12 18:02:59,073 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-06-12 18:02:59,073 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-06-12 18:02:59,074 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-06-12 18:02:59,077 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-06-12 18:02:59,078 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-06-12 18:02:59,078 INFO L137 SettingsManager]: * Assume program has a precondition=false [2023-06-12 18:02:59,078 INFO L137 SettingsManager]: * Conditional Independence=PRECOMPUTED_CONDITIONS [2023-06-12 18:02:59,080 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-06-12 18:02:59,080 INFO L137 SettingsManager]: * Save file in source directory=true [2023-06-12 18:02:59,080 INFO L137 SettingsManager]: * Use automatic naming=true [2023-06-12 18:02:59,080 INFO L137 SettingsManager]: * File name=CHC_conditional WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-06-12 18:02:59,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-06-12 18:02:59,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-06-12 18:02:59,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-06-12 18:02:59,298 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-06-12 18:02:59,298 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-06-12 18:02:59,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl [2023-06-12 18:02:59,299 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/numbered-array.bpl' [2023-06-12 18:02:59,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-06-12 18:02:59,317 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-06-12 18:02:59,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 18:02:59,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 18:02:59,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 18:02:59,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,337 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,341 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 18:02:59,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 18:02:59,343 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 18:02:59,343 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 18:02:59,344 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 18:02:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 18:02:59,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 18:02:59,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-06-12 18:02:59,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-06-12 18:02:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-06-12 18:02:59,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-06-12 18:02:59,433 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 18:02:59,435 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 18:02:59,476 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 18:02:59,491 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-06-12 18:02:59,491 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 18:02:59,494 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:02:59 BoogieIcfgContainer [2023-06-12 18:02:59,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 18:02:59,495 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-06-12 18:02:59,495 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-06-12 18:02:59,495 INFO L274 PluginConnector]: IcfgToChc initialized [2023-06-12 18:02:59,496 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,690 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'id := ctr;ctr := ctr + 1;' is: true [2023-06-12 18:02:59,694 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'id := ctr;ctr := ctr + 1;' is: true [2023-06-12 18:02:59,697 INFO L111 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'id := ctr;ctr := ctr + 1;' is: true [2023-06-12 18:02:59,818 INFO L111 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'id := ctr;ctr := ctr + 1;' is: false [2023-06-12 18:02:59,837 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'a := a[id := id];' is: true [2023-06-12 18:02:59,839 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'a := a[id := id];' is: true [2023-06-12 18:02:59,842 INFO L111 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'a := a[id := id];' is: true [2023-06-12 18:02:59,848 INFO L111 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'a := a[id := id];' is: true [2023-06-12 18:02:59,858 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-06-12 18:02:59,862 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-06-12 18:02:59,864 INFO L111 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'assume true;' is: true [2023-06-12 18:02:59,865 INFO L111 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'assume true;' is: true [2023-06-12 18:02:59,870 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-06-12 18:02:59,870 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-06-12 18:02:59,871 INFO L111 IndependenceChecker]: instantiated independence condition for 'a := a[id := id];' and 'assume true;' is: true [2023-06-12 18:02:59,873 INFO L111 IndependenceChecker]: instantiated independence condition for 'id := ctr;ctr := ctr + 1;' and 'assume true;' is: true [2023-06-12 18:02:59,894 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:02:59 HornClauseAST [2023-06-12 18:02:59,895 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-06-12 18:02:59,895 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-06-12 18:02:59,895 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-06-12 18:02:59,895 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-06-12 18:02:59,897 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,898 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/numbered-array/CHC_conditional_numbered-array.bpl_UID3238236463940660074.smt2 [2023-06-12 18:02:59,922 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-06-12 18:02:59,923 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-06-12 18:02:59,923 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-06-12 18:02:59,923 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-06-12 18:02:59,925 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,949 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59 Unit [2023-06-12 18:02:59,949 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-06-12 18:02:59,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 18:02:59,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 18:02:59,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 18:02:59,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,956 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 18:02:59,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 18:02:59,961 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 18:02:59,961 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 18:02:59,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (1/1) ... [2023-06-12 18:02:59,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 18:02:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 18:02:59,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 18:02:59,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-06-12 18:02:59,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-06-12 18:02:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-06-12 18:02:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-06-12 18:02:59,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-06-12 18:02:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-06-12 18:02:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-06-12 18:02:59,982 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 18:02:59,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 18:03:00,196 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 18:03:00,197 INFO L294 CfgBuilder]: Using library mode [2023-06-12 18:03:00,197 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 18:03:00,200 INFO L201 PluginConnector]: Adding new model numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:03:00 BoogieIcfgContainer [2023-06-12 18:03:00,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 18:03:00,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-06-12 18:03:00,202 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-06-12 18:03:00,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-06-12 18:03:00,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 06:02:59" (1/5) ... [2023-06-12 18:03:00,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1949aeda and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 06:03:00, skipping insertion in model container [2023-06-12 18:03:00,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:02:59" (2/5) ... [2023-06-12 18:03:00,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1949aeda and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 06:03:00, skipping insertion in model container [2023-06-12 18:03:00,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 06:02:59" (3/5) ... [2023-06-12 18:03:00,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1949aeda and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 12.06 06:03:00, skipping insertion in model container [2023-06-12 18:03:00,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 06:02:59" (4/5) ... [2023-06-12 18:03:00,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1949aeda and model type numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 06:03:00, skipping insertion in model container [2023-06-12 18:03:00,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "numbered-array.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 06:03:00" (5/5) ... [2023-06-12 18:03:00,206 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-06-12 18:03:00,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-06-12 18:03:00,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-06-12 18:03:00,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-06-12 18:03:00,246 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;@19f17915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-06-12 18:03:00,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-06-12 18:03:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-06-12 18:03:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-06-12 18:03:00,257 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:00,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:00,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:00,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1070326063, now seen corresponding path program 1 times [2023-06-12 18:03:00,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:00,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010258773] [2023-06-12 18:03:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:00,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:00,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:03:00,398 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010258773] [2023-06-12 18:03:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010258773] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:00,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692385776] [2023-06-12 18:03:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:00,441 INFO L87 Difference]: Start difference. First operand has 80 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:00,651 INFO L93 Difference]: Finished difference Result 154 states and 244 transitions. [2023-06-12 18:03:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-06-12 18:03:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:00,660 INFO L225 Difference]: With dead ends: 154 [2023-06-12 18:03:00,660 INFO L226 Difference]: Without dead ends: 152 [2023-06-12 18:03:00,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:00,664 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 201 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:00,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 178 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-06-12 18:03:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-06-12 18:03:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 100 states have (on average 1.44) internal successors, (144), 100 states have internal predecessors, (144), 49 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-06-12 18:03:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 242 transitions. [2023-06-12 18:03:00,699 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 242 transitions. Word has length 8 [2023-06-12 18:03:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:00,700 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 242 transitions. [2023-06-12 18:03:00,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 242 transitions. [2023-06-12 18:03:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 18:03:00,704 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:00,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-06-12 18:03:00,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:00,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1187158451, now seen corresponding path program 1 times [2023-06-12 18:03:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804751231] [2023-06-12 18:03:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:00,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:00,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:03:00,738 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:00,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804751231] [2023-06-12 18:03:00,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804751231] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:00,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:00,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:00,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415671946] [2023-06-12 18:03:00,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:00,741 INFO L87 Difference]: Start difference. First operand 152 states and 242 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:00,934 INFO L93 Difference]: Finished difference Result 258 states and 432 transitions. [2023-06-12 18:03:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:00,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 18:03:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:00,944 INFO L225 Difference]: With dead ends: 258 [2023-06-12 18:03:00,945 INFO L226 Difference]: Without dead ends: 258 [2023-06-12 18:03:00,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:00,948 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 33 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:00,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 382 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-06-12 18:03:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2023-06-12 18:03:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.5333333333333334) internal successors, (230), 150 states have internal predecessors, (230), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-06-12 18:03:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 392 transitions. [2023-06-12 18:03:00,984 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 392 transitions. Word has length 10 [2023-06-12 18:03:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:00,984 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 392 transitions. [2023-06-12 18:03:00,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 392 transitions. [2023-06-12 18:03:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 18:03:00,987 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:00,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:00,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-06-12 18:03:00,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:00,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:00,988 INFO L85 PathProgramCache]: Analyzing trace with hash 560416567, now seen corresponding path program 1 times [2023-06-12 18:03:00,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:00,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873943700] [2023-06-12 18:03:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:00,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:00,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:00,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:03:01,007 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873943700] [2023-06-12 18:03:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873943700] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:01,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083899649] [2023-06-12 18:03:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:01,009 INFO L87 Difference]: Start difference. First operand 234 states and 392 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:01,191 INFO L93 Difference]: Finished difference Result 374 states and 682 transitions. [2023-06-12 18:03:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 18:03:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:01,198 INFO L225 Difference]: With dead ends: 374 [2023-06-12 18:03:01,199 INFO L226 Difference]: Without dead ends: 374 [2023-06-12 18:03:01,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:01,199 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 25 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:01,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 362 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-06-12 18:03:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 254. [2023-06-12 18:03:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 170 states have (on average 1.8823529411764706) internal successors, (320), 170 states have internal predecessors, (320), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-06-12 18:03:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 482 transitions. [2023-06-12 18:03:01,221 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 482 transitions. Word has length 10 [2023-06-12 18:03:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:01,221 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 482 transitions. [2023-06-12 18:03:01,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 482 transitions. [2023-06-12 18:03:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 18:03:01,227 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:01,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-06-12 18:03:01,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:01,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2137670861, now seen corresponding path program 1 times [2023-06-12 18:03:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615586970] [2023-06-12 18:03:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:01,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:01,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:03:01,258 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615586970] [2023-06-12 18:03:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [615586970] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156813576] [2023-06-12 18:03:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:01,261 INFO L87 Difference]: Start difference. First operand 254 states and 482 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:01,423 INFO L93 Difference]: Finished difference Result 362 states and 712 transitions. [2023-06-12 18:03:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 18:03:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:01,431 INFO L225 Difference]: With dead ends: 362 [2023-06-12 18:03:01,431 INFO L226 Difference]: Without dead ends: 362 [2023-06-12 18:03:01,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:01,435 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 35 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:01,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 380 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-06-12 18:03:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 338. [2023-06-12 18:03:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 222 states have (on average 2.009009009009009) internal successors, (446), 222 states have internal predecessors, (446), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-06-12 18:03:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 672 transitions. [2023-06-12 18:03:01,465 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 672 transitions. Word has length 13 [2023-06-12 18:03:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:01,465 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 672 transitions. [2023-06-12 18:03:01,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 672 transitions. [2023-06-12 18:03:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 18:03:01,472 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:01,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-06-12 18:03:01,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:01,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash 518400172, now seen corresponding path program 1 times [2023-06-12 18:03:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384203488] [2023-06-12 18:03:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:01,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:01,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 18:03:01,517 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384203488] [2023-06-12 18:03:01,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [384203488] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:01,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:01,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415801902] [2023-06-12 18:03:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:01,519 INFO L87 Difference]: Start difference. First operand 338 states and 672 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:01,724 INFO L93 Difference]: Finished difference Result 528 states and 1086 transitions. [2023-06-12 18:03:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 18:03:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:01,740 INFO L225 Difference]: With dead ends: 528 [2023-06-12 18:03:01,740 INFO L226 Difference]: Without dead ends: 528 [2023-06-12 18:03:01,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:01,742 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 27 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:01,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 360 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-06-12 18:03:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 360. [2023-06-12 18:03:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 244 states have (on average 2.377049180327869) internal successors, (580), 244 states have internal predecessors, (580), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-06-12 18:03:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 806 transitions. [2023-06-12 18:03:01,774 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 806 transitions. Word has length 13 [2023-06-12 18:03:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:01,775 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 806 transitions. [2023-06-12 18:03:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 806 transitions. [2023-06-12 18:03:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 18:03:01,787 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:01,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:01,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-06-12 18:03:01,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:01,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1024932156, now seen corresponding path program 1 times [2023-06-12 18:03:01,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716491404] [2023-06-12 18:03:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:01,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-06-12 18:03:01,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 18:03:01,857 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716491404] [2023-06-12 18:03:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [716491404] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:01,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:01,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:01,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613843213] [2023-06-12 18:03:01,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:01,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:01,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:01,859 INFO L87 Difference]: Start difference. First operand 360 states and 806 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:02,020 INFO L93 Difference]: Finished difference Result 478 states and 1038 transitions. [2023-06-12 18:03:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:02,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 18:03:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:02,031 INFO L225 Difference]: With dead ends: 478 [2023-06-12 18:03:02,031 INFO L226 Difference]: Without dead ends: 478 [2023-06-12 18:03:02,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:02,033 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 30 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:02,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 388 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-06-12 18:03:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 440. [2023-06-12 18:03:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 300 states have (on average 2.34) internal successors, (702), 300 states have internal predecessors, (702), 137 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2023-06-12 18:03:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 976 transitions. [2023-06-12 18:03:02,059 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 976 transitions. Word has length 16 [2023-06-12 18:03:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:02,060 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 976 transitions. [2023-06-12 18:03:02,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 976 transitions. [2023-06-12 18:03:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 18:03:02,074 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:02,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:02,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-06-12 18:03:02,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:02,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1402653083, now seen corresponding path program 1 times [2023-06-12 18:03:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936241512] [2023-06-12 18:03:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:02,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-06-12 18:03:02,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 18:03:02,119 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936241512] [2023-06-12 18:03:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936241512] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:02,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278383302] [2023-06-12 18:03:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:02,120 INFO L87 Difference]: Start difference. First operand 440 states and 976 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:02,279 INFO L93 Difference]: Finished difference Result 594 states and 1276 transitions. [2023-06-12 18:03:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 18:03:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:02,296 INFO L225 Difference]: With dead ends: 594 [2023-06-12 18:03:02,296 INFO L226 Difference]: Without dead ends: 594 [2023-06-12 18:03:02,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:02,297 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 24 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:02,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 379 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-06-12 18:03:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 472. [2023-06-12 18:03:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 332 states have (on average 2.4096385542168677) internal successors, (800), 332 states have internal predecessors, (800), 137 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2023-06-12 18:03:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1074 transitions. [2023-06-12 18:03:02,331 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1074 transitions. Word has length 16 [2023-06-12 18:03:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:02,331 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 1074 transitions. [2023-06-12 18:03:02,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1074 transitions. [2023-06-12 18:03:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 18:03:02,368 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:02,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:02,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-06-12 18:03:02,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:02,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1872957042, now seen corresponding path program 1 times [2023-06-12 18:03:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:02,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538460579] [2023-06-12 18:03:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:02,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:02,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2023-06-12 18:03:02,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-06-12 18:03:02,474 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538460579] [2023-06-12 18:03:02,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538460579] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:02,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:02,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-06-12 18:03:02,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462151260] [2023-06-12 18:03:02,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:02,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-06-12 18:03:02,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-06-12 18:03:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:02,475 INFO L87 Difference]: Start difference. First operand 472 states and 1074 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:02,849 INFO L93 Difference]: Finished difference Result 606 states and 1356 transitions. [2023-06-12 18:03:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-06-12 18:03:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 18:03:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:02,864 INFO L225 Difference]: With dead ends: 606 [2023-06-12 18:03:02,864 INFO L226 Difference]: Without dead ends: 606 [2023-06-12 18:03:02,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-06-12 18:03:02,865 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 30 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:02,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 451 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-06-12 18:03:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-06-12 18:03:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 492. [2023-06-12 18:03:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 344 states have (on average 2.36046511627907) internal successors, (812), 344 states have internal predecessors, (812), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 18:03:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1102 transitions. [2023-06-12 18:03:02,890 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1102 transitions. Word has length 22 [2023-06-12 18:03:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:02,891 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1102 transitions. [2023-06-12 18:03:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1102 transitions. [2023-06-12 18:03:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 18:03:02,926 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:02,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:02,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-06-12 18:03:02,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:02,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1324523446, now seen corresponding path program 1 times [2023-06-12 18:03:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:02,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5801531] [2023-06-12 18:03:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:02,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:02,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-06-12 18:03:02,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 18:03:02,982 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:02,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5801531] [2023-06-12 18:03:02,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [5801531] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:02,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:02,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-06-12 18:03:02,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877840307] [2023-06-12 18:03:02,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:02,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-06-12 18:03:02,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-06-12 18:03:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:02,983 INFO L87 Difference]: Start difference. First operand 492 states and 1102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:03,258 INFO L93 Difference]: Finished difference Result 752 states and 1860 transitions. [2023-06-12 18:03:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-06-12 18:03:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 18:03:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:03,280 INFO L225 Difference]: With dead ends: 752 [2023-06-12 18:03:03,281 INFO L226 Difference]: Without dead ends: 752 [2023-06-12 18:03:03,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:03,281 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 27 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:03,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 346 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-06-12 18:03:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 494. [2023-06-12 18:03:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 346 states have (on average 2.4566473988439306) internal successors, (850), 346 states have internal predecessors, (850), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 18:03:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1140 transitions. [2023-06-12 18:03:03,340 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1140 transitions. Word has length 22 [2023-06-12 18:03:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:03,340 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1140 transitions. [2023-06-12 18:03:03,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1140 transitions. [2023-06-12 18:03:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 18:03:03,383 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:03,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-06-12 18:03:03,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:03,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash -553585318, now seen corresponding path program 2 times [2023-06-12 18:03:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109524579] [2023-06-12 18:03:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:03,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2023-06-12 18:03:03,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 18:03:03,411 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109524579] [2023-06-12 18:03:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109524579] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850045817] [2023-06-12 18:03:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:03,412 INFO L87 Difference]: Start difference. First operand 494 states and 1140 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:03,536 INFO L93 Difference]: Finished difference Result 438 states and 980 transitions. [2023-06-12 18:03:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 18:03:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:03,542 INFO L225 Difference]: With dead ends: 438 [2023-06-12 18:03:03,542 INFO L226 Difference]: Without dead ends: 438 [2023-06-12 18:03:03,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:03,543 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 4 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 267 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-06-12 18:03:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2023-06-12 18:03:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 298 states have (on average 2.3959731543624163) internal successors, (714), 298 states have internal predecessors, (714), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-06-12 18:03:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 940 transitions. [2023-06-12 18:03:03,560 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 940 transitions. Word has length 22 [2023-06-12 18:03:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:03,560 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 940 transitions. [2023-06-12 18:03:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:03:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 940 transitions. [2023-06-12 18:03:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:03:03,576 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:03,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-06-12 18:03:03,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:03,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1815658114, now seen corresponding path program 1 times [2023-06-12 18:03:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087099268] [2023-06-12 18:03:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:03,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:03,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:03:03,597 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087099268] [2023-06-12 18:03:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087099268] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:03,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:03,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:03,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287658280] [2023-06-12 18:03:03,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:03,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:03,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:03,598 INFO L87 Difference]: Start difference. First operand 414 states and 940 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:03,762 INFO L93 Difference]: Finished difference Result 524 states and 1198 transitions. [2023-06-12 18:03:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:03,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:03:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:03,770 INFO L225 Difference]: With dead ends: 524 [2023-06-12 18:03:03,771 INFO L226 Difference]: Without dead ends: 524 [2023-06-12 18:03:03,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:03,771 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 31 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:03,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 343 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-06-12 18:03:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2023-06-12 18:03:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 352 states have (on average 2.465909090909091) internal successors, (868), 352 states have internal predecessors, (868), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 18:03:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1158 transitions. [2023-06-12 18:03:03,793 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1158 transitions. Word has length 27 [2023-06-12 18:03:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1158 transitions. [2023-06-12 18:03:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1158 transitions. [2023-06-12 18:03:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:03:03,812 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:03,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:03,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-06-12 18:03:03,813 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:03,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -146387956, now seen corresponding path program 1 times [2023-06-12 18:03:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:03,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805377741] [2023-06-12 18:03:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:03,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:03,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:03:03,855 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805377741] [2023-06-12 18:03:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [805377741] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:03,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:03,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:03,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662157378] [2023-06-12 18:03:03,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:03,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:03,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:03,856 INFO L87 Difference]: Start difference. First operand 500 states and 1158 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:03:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:04,670 INFO L93 Difference]: Finished difference Result 836 states and 2145 transitions. [2023-06-12 18:03:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:03:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-06-12 18:03:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:04,712 INFO L225 Difference]: With dead ends: 836 [2023-06-12 18:03:04,712 INFO L226 Difference]: Without dead ends: 835 [2023-06-12 18:03:04,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:03:04,713 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 249 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:04,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 347 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-06-12 18:03:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-06-12 18:03:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 736. [2023-06-12 18:03:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 499 states have (on average 2.527054108216433) internal successors, (1261), 516 states have internal predecessors, (1261), 233 states have call successors, (233), 2 states have call predecessors, (233), 3 states have return successors, (413), 217 states have call predecessors, (413), 233 states have call successors, (413) [2023-06-12 18:03:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1907 transitions. [2023-06-12 18:03:04,824 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1907 transitions. Word has length 27 [2023-06-12 18:03:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:04,824 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1907 transitions. [2023-06-12 18:03:04,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:03:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1907 transitions. [2023-06-12 18:03:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:03:04,849 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:04,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-06-12 18:03:04,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:04,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash -504320189, now seen corresponding path program 1 times [2023-06-12 18:03:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:04,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428129531] [2023-06-12 18:03:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:04,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:04,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:03:04,881 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:04,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428129531] [2023-06-12 18:03:04,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [428129531] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:04,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:04,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280806759] [2023-06-12 18:03:04,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:04,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:04,882 INFO L87 Difference]: Start difference. First operand 736 states and 1907 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:05,115 INFO L93 Difference]: Finished difference Result 1126 states and 2927 transitions. [2023-06-12 18:03:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:03:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:05,185 INFO L225 Difference]: With dead ends: 1126 [2023-06-12 18:03:05,186 INFO L226 Difference]: Without dead ends: 1126 [2023-06-12 18:03:05,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:05,186 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 24 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2023-06-12 18:03:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 768. [2023-06-12 18:03:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 531 states have (on average 2.7947269303201505) internal successors, (1484), 548 states have internal predecessors, (1484), 233 states have call successors, (233), 2 states have call predecessors, (233), 3 states have return successors, (413), 217 states have call predecessors, (413), 233 states have call successors, (413) [2023-06-12 18:03:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2130 transitions. [2023-06-12 18:03:05,292 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2130 transitions. Word has length 27 [2023-06-12 18:03:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:05,293 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 2130 transitions. [2023-06-12 18:03:05,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2130 transitions. [2023-06-12 18:03:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:03:05,317 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:05,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-06-12 18:03:05,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:05,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 406925669, now seen corresponding path program 1 times [2023-06-12 18:03:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:05,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541578177] [2023-06-12 18:03:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:05,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:05,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:03:05,336 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541578177] [2023-06-12 18:03:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541578177] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:05,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197234307] [2023-06-12 18:03:05,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:05,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:05,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:05,337 INFO L87 Difference]: Start difference. First operand 768 states and 2130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:05,560 INFO L93 Difference]: Finished difference Result 1176 states and 3207 transitions. [2023-06-12 18:03:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:03:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:05,657 INFO L225 Difference]: With dead ends: 1176 [2023-06-12 18:03:05,657 INFO L226 Difference]: Without dead ends: 1176 [2023-06-12 18:03:05,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:05,658 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 29 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:05,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 305 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-06-12 18:03:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-06-12 18:03:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 768. [2023-06-12 18:03:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 531 states have (on average 2.7947269303201505) internal successors, (1484), 548 states have internal predecessors, (1484), 233 states have call successors, (233), 2 states have call predecessors, (233), 3 states have return successors, (413), 217 states have call predecessors, (413), 233 states have call successors, (413) [2023-06-12 18:03:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2130 transitions. [2023-06-12 18:03:05,746 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2130 transitions. Word has length 27 [2023-06-12 18:03:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 2130 transitions. [2023-06-12 18:03:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2130 transitions. [2023-06-12 18:03:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:03:05,769 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:05,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:05,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-06-12 18:03:05,769 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:05,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 707385096, now seen corresponding path program 1 times [2023-06-12 18:03:05,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:05,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485918511] [2023-06-12 18:03:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:05,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:05,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:05,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:03:05,798 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485918511] [2023-06-12 18:03:05,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485918511] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:05,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:05,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528127902] [2023-06-12 18:03:05,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:05,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:05,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:05,799 INFO L87 Difference]: Start difference. First operand 768 states and 2130 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:03:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:06,846 INFO L93 Difference]: Finished difference Result 2000 states and 6439 transitions. [2023-06-12 18:03:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:03:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-06-12 18:03:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:07,140 INFO L225 Difference]: With dead ends: 2000 [2023-06-12 18:03:07,140 INFO L226 Difference]: Without dead ends: 2000 [2023-06-12 18:03:07,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 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 18:03:07,141 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 178 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:07,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 355 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-06-12 18:03:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2023-06-12 18:03:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1628. [2023-06-12 18:03:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 902 states have (on average 3.12860310421286) internal successors, (2822), 1163 states have internal predecessors, (2822), 720 states have call successors, (720), 2 states have call predecessors, (720), 5 states have return successors, (2033), 462 states have call predecessors, (2033), 720 states have call successors, (2033) [2023-06-12 18:03:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5575 transitions. [2023-06-12 18:03:07,709 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5575 transitions. Word has length 27 [2023-06-12 18:03:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:07,709 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 5575 transitions. [2023-06-12 18:03:07,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:03:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5575 transitions. [2023-06-12 18:03:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:03:07,839 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:07,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-06-12 18:03:07,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:07,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1503950861, now seen corresponding path program 1 times [2023-06-12 18:03:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581502743] [2023-06-12 18:03:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:07,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:07,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:03:07,880 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581502743] [2023-06-12 18:03:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581502743] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:07,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:07,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:07,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724035602] [2023-06-12 18:03:07,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:07,881 INFO L87 Difference]: Start difference. First operand 1628 states and 5575 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 18:03:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:09,696 INFO L93 Difference]: Finished difference Result 2607 states and 12165 transitions. [2023-06-12 18:03:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:03:09,697 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 18:03:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:10,442 INFO L225 Difference]: With dead ends: 2607 [2023-06-12 18:03:10,442 INFO L226 Difference]: Without dead ends: 2607 [2023-06-12 18:03:10,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:03:10,443 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 249 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 280 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-06-12 18:03:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2023-06-12 18:03:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1637. [2023-06-12 18:03:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 905 states have (on average 3.129281767955801) internal successors, (2832), 1172 states have internal predecessors, (2832), 726 states have call successors, (726), 2 states have call predecessors, (726), 5 states have return successors, (2057), 462 states have call predecessors, (2057), 726 states have call successors, (2057) [2023-06-12 18:03:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5615 transitions. [2023-06-12 18:03:11,465 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5615 transitions. Word has length 30 [2023-06-12 18:03:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:11,465 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 5615 transitions. [2023-06-12 18:03:11,465 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 18:03:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5615 transitions. [2023-06-12 18:03:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:03:11,601 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:11,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-06-12 18:03:11,601 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:11,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1571437674, now seen corresponding path program 1 times [2023-06-12 18:03:11,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:11,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756098949] [2023-06-12 18:03:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:11,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:03:11,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 18:03:11,636 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756098949] [2023-06-12 18:03:11,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [756098949] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:03:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:03:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:03:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695203356] [2023-06-12 18:03:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:03:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:03:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:03:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:03:11,637 INFO L87 Difference]: Start difference. First operand 1637 states and 5615 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:12,292 INFO L93 Difference]: Finished difference Result 2258 states and 7964 transitions. [2023-06-12 18:03:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:03:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-06-12 18:03:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:12,782 INFO L225 Difference]: With dead ends: 2258 [2023-06-12 18:03:12,782 INFO L226 Difference]: Without dead ends: 2258 [2023-06-12 18:03:12,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:12,783 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 34 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:12,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 285 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-06-12 18:03:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2023-06-12 18:03:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1637. [2023-06-12 18:03:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 905 states have (on average 3.129281767955801) internal successors, (2832), 1172 states have internal predecessors, (2832), 726 states have call successors, (726), 2 states have call predecessors, (726), 5 states have return successors, (2057), 462 states have call predecessors, (2057), 726 states have call successors, (2057) [2023-06-12 18:03:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5615 transitions. [2023-06-12 18:03:13,428 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5615 transitions. Word has length 30 [2023-06-12 18:03:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:13,428 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 5615 transitions. [2023-06-12 18:03:13,428 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 18:03:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5615 transitions. [2023-06-12 18:03:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-06-12 18:03:13,568 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:13,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:13,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-06-12 18:03:13,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:13,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1371140705, now seen corresponding path program 1 times [2023-06-12 18:03:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:13,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568785981] [2023-06-12 18:03:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:13,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:13,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:03:13,601 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:13,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568785981] [2023-06-12 18:03:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568785981] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:13,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:13,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272598301] [2023-06-12 18:03:13,603 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:13,604 INFO L87 Difference]: Start difference. First operand 1637 states and 5615 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 18:03:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:15,294 INFO L93 Difference]: Finished difference Result 2733 states and 11639 transitions. [2023-06-12 18:03:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:03:15,295 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 18:03:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:16,023 INFO L225 Difference]: With dead ends: 2733 [2023-06-12 18:03:16,023 INFO L226 Difference]: Without dead ends: 2733 [2023-06-12 18:03:16,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 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 18:03:16,024 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 175 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:16,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 372 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-06-12 18:03:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2023-06-12 18:03:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1637. [2023-06-12 18:03:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 905 states have (on average 3.129281767955801) internal successors, (2832), 1172 states have internal predecessors, (2832), 726 states have call successors, (726), 2 states have call predecessors, (726), 5 states have return successors, (2057), 462 states have call predecessors, (2057), 726 states have call successors, (2057) [2023-06-12 18:03:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5615 transitions. [2023-06-12 18:03:16,794 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5615 transitions. Word has length 30 [2023-06-12 18:03:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:16,794 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 5615 transitions. [2023-06-12 18:03:16,795 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 18:03:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5615 transitions. [2023-06-12 18:03:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:03:17,265 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:17,265 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 18:03:17,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-06-12 18:03:17,265 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:17,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:17,266 INFO L85 PathProgramCache]: Analyzing trace with hash 533393373, now seen corresponding path program 1 times [2023-06-12 18:03:17,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:17,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088449976] [2023-06-12 18:03:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:17,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:17,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-06-12 18:03:17,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-06-12 18:03:17,298 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:17,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088449976] [2023-06-12 18:03:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088449976] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:17,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-06-12 18:03:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89772834] [2023-06-12 18:03:17,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-06-12 18:03:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-06-12 18:03:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:03:17,299 INFO L87 Difference]: Start difference. First operand 1637 states and 5615 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:18,277 INFO L93 Difference]: Finished difference Result 2266 states and 7840 transitions. [2023-06-12 18:03:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-06-12 18:03:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 33 [2023-06-12 18:03:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:18,874 INFO L225 Difference]: With dead ends: 2266 [2023-06-12 18:03:18,875 INFO L226 Difference]: Without dead ends: 2266 [2023-06-12 18:03:18,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-06-12 18:03:18,875 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 57 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:18,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 549 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:03:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2023-06-12 18:03:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1721. [2023-06-12 18:03:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 945 states have (on average 3.039153439153439) internal successors, (2872), 1192 states have internal predecessors, (2872), 770 states have call successors, (770), 2 states have call predecessors, (770), 5 states have return successors, (2193), 526 states have call predecessors, (2193), 770 states have call successors, (2193) [2023-06-12 18:03:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5835 transitions. [2023-06-12 18:03:19,483 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5835 transitions. Word has length 33 [2023-06-12 18:03:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:19,483 INFO L495 AbstractCegarLoop]: Abstraction has 1721 states and 5835 transitions. [2023-06-12 18:03:19,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5835 transitions. [2023-06-12 18:03:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-06-12 18:03:19,945 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:19,945 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 18:03:19,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-06-12 18:03:19,945 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:19,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -940240288, now seen corresponding path program 1 times [2023-06-12 18:03:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371526734] [2023-06-12 18:03:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:19,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:19,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 18:03:19,982 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371526734] [2023-06-12 18:03:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371526734] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:19,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466545863] [2023-06-12 18:03:19,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:19,985 INFO L87 Difference]: Start difference. First operand 1721 states and 5835 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:22,157 INFO L93 Difference]: Finished difference Result 3095 states and 11531 transitions. [2023-06-12 18:03:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-06-12 18:03:22,158 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-06-12 18:03:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:23,107 INFO L225 Difference]: With dead ends: 3095 [2023-06-12 18:03:23,108 INFO L226 Difference]: Without dead ends: 3095 [2023-06-12 18:03:23,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-06-12 18:03:23,108 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 169 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:23,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 429 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-06-12 18:03:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2023-06-12 18:03:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2498. [2023-06-12 18:03:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1299 states have (on average 3.083910700538876) internal successors, (4006), 1644 states have internal predecessors, (4006), 1191 states have call successors, (1191), 2 states have call predecessors, (1191), 7 states have return successors, (4921), 851 states have call predecessors, (4921), 1191 states have call successors, (4921) [2023-06-12 18:03:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 10118 transitions. [2023-06-12 18:03:24,448 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 10118 transitions. Word has length 33 [2023-06-12 18:03:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:24,448 INFO L495 AbstractCegarLoop]: Abstraction has 2498 states and 10118 transitions. [2023-06-12 18:03:24,448 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 10118 transitions. [2023-06-12 18:03:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-06-12 18:03:25,712 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:25,712 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, 1, 1, 1] [2023-06-12 18:03:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-06-12 18:03:25,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:25,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 427852587, now seen corresponding path program 1 times [2023-06-12 18:03:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:25,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307549210] [2023-06-12 18:03:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:25,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:25,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:03:25,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 18:03:25,768 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:25,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307549210] [2023-06-12 18:03:25,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307549210] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:25,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:03:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767130450] [2023-06-12 18:03:25,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:03:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:03:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:03:25,770 INFO L87 Difference]: Start difference. First operand 2498 states and 10118 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:27,937 INFO L93 Difference]: Finished difference Result 3063 states and 12853 transitions. [2023-06-12 18:03:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-06-12 18:03:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-06-12 18:03:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:03:28,973 INFO L225 Difference]: With dead ends: 3063 [2023-06-12 18:03:28,973 INFO L226 Difference]: Without dead ends: 3063 [2023-06-12 18:03:28,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-06-12 18:03:28,974 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 164 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-06-12 18:03:28,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 426 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-06-12 18:03:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2023-06-12 18:03:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 1797. [2023-06-12 18:03:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 945 states have (on average 3.039153439153439) internal successors, (2872), 1192 states have internal predecessors, (2872), 846 states have call successors, (846), 2 states have call predecessors, (846), 5 states have return successors, (2345), 602 states have call predecessors, (2345), 846 states have call successors, (2345) [2023-06-12 18:03:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 6063 transitions. [2023-06-12 18:03:29,857 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 6063 transitions. Word has length 36 [2023-06-12 18:03:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:03:29,858 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 6063 transitions. [2023-06-12 18:03:29,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:03:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 6063 transitions. [2023-06-12 18:03:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-06-12 18:03:30,659 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:03:30,659 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:03:30,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-06-12 18:03:30,660 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:03:30,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:03:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1553089507, now seen corresponding path program 1 times [2023-06-12 18:03:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:03:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546723613] [2023-06-12 18:03:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:03:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:03:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:03:30,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 21 conjunts are in the unsatisfiable core [2023-06-12 18:03:30,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:03:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-06-12 18:03:30,780 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:03:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546723613] [2023-06-12 18:03:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [546723613] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:03:30,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:03:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-06-12 18:03:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490979734] [2023-06-12 18:03:30,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:03:30,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-06-12 18:03:30,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:03:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-06-12 18:03:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-06-12 18:03:30,781 INFO L87 Difference]: Start difference. First operand 1797 states and 6063 transitions. Second operand has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-06-12 18:03:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:03:47,121 INFO L93 Difference]: Finished difference Result 10083 states and 79873 transitions. [2023-06-12 18:03:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-06-12 18:03:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2023-06-12 18:03:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:04:02,866 INFO L225 Difference]: With dead ends: 10083 [2023-06-12 18:04:02,866 INFO L226 Difference]: Without dead ends: 10083 [2023-06-12 18:04:02,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-06-12 18:04:02,867 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 350 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 4148 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 4920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 4148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:04:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1415 Invalid, 4920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 4148 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-06-12 18:04:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10083 states. [2023-06-12 18:04:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10083 to 8728. [2023-06-12 18:04:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 4073 states have (on average 3.095506997299288) internal successors, (12608), 5514 states have internal predecessors, (12608), 4627 states have call successors, (4627), 6 states have call predecessors, (4627), 27 states have return successors, (46380), 3207 states have call predecessors, (46380), 4627 states have call successors, (46380) [2023-06-12 18:04:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 63615 transitions. [2023-06-12 18:04:22,160 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 63615 transitions. Word has length 56 [2023-06-12 18:04:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:04:22,160 INFO L495 AbstractCegarLoop]: Abstraction has 8728 states and 63615 transitions. [2023-06-12 18:04:22,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-06-12 18:04:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 63615 transitions. [2023-06-12 18:04:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-06-12 18:04:28,916 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:04:28,916 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2023-06-12 18:04:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-06-12 18:04:28,916 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:04:28,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:04:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 673970226, now seen corresponding path program 1 times [2023-06-12 18:04:28,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:04:28,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313189886] [2023-06-12 18:04:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:04:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:04:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:04:28,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2023-06-12 18:04:28,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:04:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-06-12 18:04:28,999 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:04:28,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313189886] [2023-06-12 18:04:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [313189886] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:04:28,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:04:29,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-06-12 18:04:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557942534] [2023-06-12 18:04:29,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:04:29,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-06-12 18:04:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:04:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-06-12 18:04:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-06-12 18:04:29,001 INFO L87 Difference]: Start difference. First operand 8728 states and 63615 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)