/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:37:20,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:37:20,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:37:20,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:37:20,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:37:20,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:37:20,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:37:20,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:37:20,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:37:20,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:37:20,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:37:20,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:37:20,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:37:20,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:37:20,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:37:20,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:37:20,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:37:20,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:37:20,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:37:20,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:37:20,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:37:20,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:37:20,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:37:20,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:37:20,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:37:20,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:37:20,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:37:20,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:37:20,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:37:20,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:37:20,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:37:20,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:37:20,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:37:20,420 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:37:20,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:37:20,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:37:20,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:37:20,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:37:20,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:37:20,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:37:20,421 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:37:20,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:37:20,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:37:20,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:37:20,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:37:20,836 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:37:20,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2021-02-23 22:37:20,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742614d74/fa280bcb672241ba9e8b7c85b924f038/FLAG0db116266 [2021-02-23 22:37:21,651 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:37:21,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2021-02-23 22:37:21,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742614d74/fa280bcb672241ba9e8b7c85b924f038/FLAG0db116266 [2021-02-23 22:37:22,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742614d74/fa280bcb672241ba9e8b7c85b924f038 [2021-02-23 22:37:22,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:37:22,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:37:22,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:37:22,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:37:22,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:37:22,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254ecc6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22, skipping insertion in model container [2021-02-23 22:37:22,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:37:22,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:37:22,232 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2021-02-23 22:37:22,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:37:22,247 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:37:22,267 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2021-02-23 22:37:22,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:37:22,285 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:37:22,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22 WrapperNode [2021-02-23 22:37:22,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:37:22,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:37:22,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:37:22,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:37:22,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... [2021-02-23 22:37:22,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:37:22,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:37:22,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:37:22,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:37:22,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:37:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:37:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:37:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:37:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-02-23 22:37:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:37:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:37:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:37:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:37:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:37:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:37:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:37:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:37:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:37:22,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:37:22,845 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:37:22,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:37:22 BoogieIcfgContainer [2021-02-23 22:37:22,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:37:22,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:37:22,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:37:22,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:37:22,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:37:22" (1/3) ... [2021-02-23 22:37:22,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1ab9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:37:22, skipping insertion in model container [2021-02-23 22:37:22,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:37:22" (2/3) ... [2021-02-23 22:37:22,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1ab9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:37:22, skipping insertion in model container [2021-02-23 22:37:22,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:37:22" (3/3) ... [2021-02-23 22:37:22,857 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2021-02-23 22:37:22,865 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:37:22,871 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:37:22,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:37:22,920 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:37:22,920 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:37:22,921 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:37:22,921 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:37:22,921 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:37:22,921 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:37:22,921 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:37:22,922 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:37:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 22:37:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 22:37:22,951 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:22,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:22,953 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 305373308, now seen corresponding path program 1 times [2021-02-23 22:37:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:22,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714208233] [2021-02-23 22:37:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:23,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:23,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:23,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:23,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 22:37:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:37:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714208233] [2021-02-23 22:37:23,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:37:23,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 22:37:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222288190] [2021-02-23 22:37:23,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:37:23,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:37:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:37:23,494 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 8 states. [2021-02-23 22:37:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:24,610 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-02-23 22:37:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:37:24,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 22:37:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:24,623 INFO L225 Difference]: With dead ends: 70 [2021-02-23 22:37:24,624 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 22:37:24,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:37:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 22:37:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-23 22:37:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 22:37:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-02-23 22:37:24,685 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2021-02-23 22:37:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:24,686 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-02-23 22:37:24,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:37:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-02-23 22:37:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 22:37:24,690 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:24,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:24,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:37:24,691 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash -40053035, now seen corresponding path program 1 times [2021-02-23 22:37:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:24,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297329433] [2021-02-23 22:37:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:24,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:24,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:24,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,961 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:24,962 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:24,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 22:37:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 22:37:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297329433] [2021-02-23 22:37:25,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:37:25,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 22:37:25,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829054962] [2021-02-23 22:37:25,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:37:25,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:25,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:37:25,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:37:25,019 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2021-02-23 22:37:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:25,957 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 22:37:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:37:25,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-23 22:37:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:25,960 INFO L225 Difference]: With dead ends: 58 [2021-02-23 22:37:25,961 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 22:37:25,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:37:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 22:37:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 22:37:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 22:37:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-02-23 22:37:25,981 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 42 [2021-02-23 22:37:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:25,981 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-02-23 22:37:25,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:37:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-02-23 22:37:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 22:37:25,984 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:25,984 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:25,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:37:25,985 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1732856645, now seen corresponding path program 1 times [2021-02-23 22:37:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312977546] [2021-02-23 22:37:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:26,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 22:37:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 22:37:26,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312977546] [2021-02-23 22:37:26,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:26,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-23 22:37:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41268142] [2021-02-23 22:37:26,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:37:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:37:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:37:26,156 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2021-02-23 22:37:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:26,568 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-02-23 22:37:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:37:26,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-02-23 22:37:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:26,572 INFO L225 Difference]: With dead ends: 81 [2021-02-23 22:37:26,572 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 22:37:26,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:37:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 22:37:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-23 22:37:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 22:37:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 22:37:26,595 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 51 [2021-02-23 22:37:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:26,596 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 22:37:26,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:37:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 22:37:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-23 22:37:26,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:26,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:26,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:37:26,600 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1101309652, now seen corresponding path program 1 times [2021-02-23 22:37:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:26,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758683830] [2021-02-23 22:37:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,853 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:26,854 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:26,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 22:37:26,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 22:37:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:26,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 22:37:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-02-23 22:37:26,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758683830] [2021-02-23 22:37:26,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:26,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 22:37:26,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122646437] [2021-02-23 22:37:26,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 22:37:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 22:37:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:37:26,973 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 14 states. [2021-02-23 22:37:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:29,300 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-02-23 22:37:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 22:37:29,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-02-23 22:37:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:29,305 INFO L225 Difference]: With dead ends: 95 [2021-02-23 22:37:29,305 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 22:37:29,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 22:37:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 22:37:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2021-02-23 22:37:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 22:37:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-02-23 22:37:29,335 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 61 [2021-02-23 22:37:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:29,336 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-02-23 22:37:29,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 22:37:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-02-23 22:37:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 22:37:29,340 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:29,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:29,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:37:29,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash 752897773, now seen corresponding path program 2 times [2021-02-23 22:37:29,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:29,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3286140] [2021-02-23 22:37:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 22:37:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-02-23 22:37:29,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3286140] [2021-02-23 22:37:29,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:29,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:37:29,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563849477] [2021-02-23 22:37:29,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:37:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:37:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:37:29,591 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 8 states. [2021-02-23 22:37:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:30,320 INFO L93 Difference]: Finished difference Result 133 states and 200 transitions. [2021-02-23 22:37:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:37:30,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2021-02-23 22:37:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:30,324 INFO L225 Difference]: With dead ends: 133 [2021-02-23 22:37:30,324 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 22:37:30,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:37:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 22:37:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-02-23 22:37:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-23 22:37:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-02-23 22:37:30,360 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 71 [2021-02-23 22:37:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:30,360 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-02-23 22:37:30,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:37:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-02-23 22:37:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 22:37:30,363 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:30,364 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:30,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:37:30,364 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2141089131, now seen corresponding path program 3 times [2021-02-23 22:37:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:30,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761854708] [2021-02-23 22:37:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,648 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:30,649 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:30,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 22:37:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 22:37:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:30,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:30,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:30,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:30,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 22:37:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-02-23 22:37:30,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761854708] [2021-02-23 22:37:30,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:30,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 22:37:30,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806783934] [2021-02-23 22:37:30,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 22:37:30,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:30,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 22:37:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-23 22:37:30,772 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 15 states. [2021-02-23 22:37:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:33,054 INFO L93 Difference]: Finished difference Result 162 states and 253 transitions. [2021-02-23 22:37:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 22:37:33,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 22:37:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:33,068 INFO L225 Difference]: With dead ends: 162 [2021-02-23 22:37:33,068 INFO L226 Difference]: Without dead ends: 156 [2021-02-23 22:37:33,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 22:37:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-23 22:37:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-02-23 22:37:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-23 22:37:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-02-23 22:37:33,136 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 71 [2021-02-23 22:37:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:33,136 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-02-23 22:37:33,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 22:37:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-02-23 22:37:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 22:37:33,139 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:33,139 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:33,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 22:37:33,139 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash -887616517, now seen corresponding path program 4 times [2021-02-23 22:37:33,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:33,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660400485] [2021-02-23 22:37:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-02-23 22:37:33,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660400485] [2021-02-23 22:37:33,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:33,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-23 22:37:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015232458] [2021-02-23 22:37:33,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 22:37:33,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 22:37:33,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:37:33,314 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 5 states. [2021-02-23 22:37:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:33,585 INFO L93 Difference]: Finished difference Result 152 states and 226 transitions. [2021-02-23 22:37:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 22:37:33,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2021-02-23 22:37:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:33,588 INFO L225 Difference]: With dead ends: 152 [2021-02-23 22:37:33,588 INFO L226 Difference]: Without dead ends: 86 [2021-02-23 22:37:33,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:37:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-23 22:37:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-02-23 22:37:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-23 22:37:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2021-02-23 22:37:33,614 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 91 [2021-02-23 22:37:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:33,615 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2021-02-23 22:37:33,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 22:37:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2021-02-23 22:37:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-02-23 22:37:33,617 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:33,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:33,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 22:37:33,617 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 703900207, now seen corresponding path program 5 times [2021-02-23 22:37:33,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:33,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912593435] [2021-02-23 22:37:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:37:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:33,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:33,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:33,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:33,977 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:33,978 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:34,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 22:37:34,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 22:37:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:34,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 22:37:34,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 22:37:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:34,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:37:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 22:37:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-02-23 22:37:34,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912593435] [2021-02-23 22:37:34,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:34,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 22:37:34,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824170713] [2021-02-23 22:37:34,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 22:37:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 22:37:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:37:34,168 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand 17 states. [2021-02-23 22:37:34,779 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-23 22:37:34,913 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-23 22:37:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:36,985 INFO L93 Difference]: Finished difference Result 153 states and 242 transitions. [2021-02-23 22:37:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 22:37:36,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 100 [2021-02-23 22:37:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:36,987 INFO L225 Difference]: With dead ends: 153 [2021-02-23 22:37:36,987 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 22:37:36,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=377, Invalid=1345, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 22:37:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 22:37:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 22:37:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 22:37:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 22:37:36,991 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-02-23 22:37:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:36,991 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 22:37:36,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 22:37:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 22:37:36,991 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 22:37:36,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 22:37:36,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 22:37:40,513 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-23 22:37:40,890 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-23 22:37:41,420 WARN L202 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-23 22:37:41,843 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-23 22:37:42,138 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2021-02-23 22:37:42,337 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 14 [2021-02-23 22:37:42,966 WARN L202 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2021-02-23 22:37:43,086 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 10 [2021-02-23 22:37:43,243 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 9 [2021-02-23 22:37:43,688 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 12 [2021-02-23 22:37:43,934 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 19 [2021-02-23 22:37:44,201 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 19 [2021-02-23 22:37:44,518 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2021-02-23 22:37:44,623 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 7 [2021-02-23 22:37:45,127 WARN L202 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2021-02-23 22:37:45,132 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 22:37:45,132 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 22:37:45,132 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 22:37:45,132 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,132 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,132 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,132 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,132 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,133 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point L35-2(line 35) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 28 48) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: false [2021-02-23 22:37:45,134 INFO L185 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: false [2021-02-23 22:37:45,134 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 28 48) the Hoare annotation is: true [2021-02-23 22:37:45,134 INFO L185 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (<= 0 main_~n~0) [2021-02-23 22:37:45,135 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (<= 0 main_~n~0) [2021-02-23 22:37:45,135 INFO L185 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|)) [2021-02-23 22:37:45,135 INFO L192 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: true [2021-02-23 22:37:45,135 INFO L185 CegarLoopUtils]: At program point L42-2(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|)) [2021-02-23 22:37:45,135 INFO L185 CegarLoopUtils]: At program point L42-3(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|) (<= 1 main_~result~0)) [2021-02-23 22:37:45,135 INFO L192 CegarLoopUtils]: At program point L36(lines 36 41) the Hoare annotation is: true [2021-02-23 22:37:45,135 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) the Hoare annotation is: false [2021-02-23 22:37:45,135 INFO L192 CegarLoopUtils]: At program point L30(lines 30 34) the Hoare annotation is: true [2021-02-23 22:37:45,135 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 28 48) the Hoare annotation is: true [2021-02-23 22:37:45,136 INFO L185 CegarLoopUtils]: At program point L43(lines 43 47) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 main_~result~0)) [2021-02-23 22:37:45,136 INFO L192 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-02-23 22:37:45,136 INFO L192 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: true [2021-02-23 22:37:45,136 INFO L185 CegarLoopUtils]: At program point ackermannEXIT(lines 17 25) the Hoare annotation is: (let ((.cse5 (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) (.cse3 (= |ackermann_#in~m| 0))) (and (let ((.cse0 (<= 2 |ackermann_#res|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse1 (or (and .cse0 .cse4) (and .cse5 .cse4))) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 (<= |ackermann_#in~m| 1) .cse1 (= |ackermann_#in~n| 0) .cse2) (and .cse1 .cse2 .cse3) (and (<= 3 |ackermann_#res|) .cse4 .cse2)))) (or (and .cse5 .cse3) (<= 1 |ackermann_#in~m|)))) [2021-02-23 22:37:45,136 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,136 INFO L185 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3))))) [2021-02-23 22:37:45,137 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,137 INFO L185 CegarLoopUtils]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3))))) [2021-02-23 22:37:45,137 INFO L192 CegarLoopUtils]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2021-02-23 22:37:45,137 INFO L185 CegarLoopUtils]: At program point L21(lines 21 23) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,137 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (let ((.cse0 (= |ackermann_#in~n| 0)) (.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) .cse0 .cse1 (<= 2 |ackermann_#t~ret7|) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (<= 3 |ackermann_#t~ret7|)))) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L24-3(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (<= 3 |ackermann_#t~ret9|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|)) (.cse4 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 .cse4))))) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= |ackermann_#in~n| 0)) (.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) .cse0 .cse1 (<= 2 |ackermann_#t~ret7|) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (<= 3 |ackermann_#t~ret7|)))) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L24-4(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (<= 3 |ackermann_#t~ret9|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|)) (.cse4 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 .cse4))))) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (= |ackermann_#in~m| 0)) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L22-3(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (let ((.cse0 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= 3 |ackermann_#res|) .cse0 (<= 3 |ackermann_#t~ret7|)) (and (<= 2 |ackermann_#res|) (<= |ackermann_#in~m| 1) .cse0 (<= 2 |ackermann_#t~ret7|)))) (<= 1 |ackermann_#in~m|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,138 INFO L185 CegarLoopUtils]: At program point L24-5(line 24) the Hoare annotation is: (and (let ((.cse0 (<= 1 |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse0) (and (<= 3 |ackermann_#t~ret8|) .cse0))) (<= 3 |ackermann_#t~ret9|) (<= 3 |ackermann_#res|) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,139 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,139 INFO L185 CegarLoopUtils]: At program point L24-6(line 24) the Hoare annotation is: (and (<= 3 |ackermann_#t~ret9|) (<= 3 |ackermann_#res|) (= ackermann_~n |ackermann_#in~n|) (<= 1 |ackermann_#in~m|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 22:37:45,139 INFO L185 CegarLoopUtils]: At program point L17(lines 17 25) the Hoare annotation is: (= ackermann_~m |ackermann_#in~m|) [2021-02-23 22:37:45,139 INFO L185 CegarLoopUtils]: At program point ackermannFINAL(lines 17 25) the Hoare annotation is: (let ((.cse5 (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) (.cse3 (= |ackermann_#in~m| 0))) (and (let ((.cse0 (<= 2 |ackermann_#res|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse1 (or (and .cse0 .cse4) (and .cse5 .cse4))) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 (<= |ackermann_#in~m| 1) .cse1 (= |ackermann_#in~n| 0) .cse2) (and .cse1 .cse2 .cse3) (and (<= 3 |ackermann_#res|) .cse4 .cse2)))) (or (and .cse5 .cse3) (<= 1 |ackermann_#in~m|)))) [2021-02-23 22:37:45,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:37:45 BoogieIcfgContainer [2021-02-23 22:37:45,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:37:45,158 INFO L168 Benchmark]: Toolchain (without parser) took 23127.03 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.8 MB in the beginning and 188.9 MB in the end (delta: -61.1 MB). Peak memory consumption was 189.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:37:45,159 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:37:45,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.87 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:37:45,159 INFO L168 Benchmark]: Boogie Preprocessor took 36.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 116.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:37:45,160 INFO L168 Benchmark]: RCFGBuilder took 522.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.4 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:37:45,162 INFO L168 Benchmark]: TraceAbstraction took 22308.42 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 131.9 MB in the beginning and 188.9 MB in the end (delta: -57.0 MB). Peak memory consumption was 192.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:37:45,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.87 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.75 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 116.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 522.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.4 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22308.42 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 131.9 MB in the beginning and 188.9 MB in the end (delta: -57.0 MB). Peak memory consumption was 192.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 17]: Procedure Contract for ackermann Derived contract for procedure ackermann: ((((((2 <= \result && \old(m) <= 1) && ((2 <= \result && n == \old(n)) || (\old(n) + 1 <= \result && n == \old(n)))) && \old(n) == 0) && m == \old(m)) || ((((2 <= \result && n == \old(n)) || (\old(n) + 1 <= \result && n == \old(n))) && m == \old(m)) && \old(m) == 0)) || ((3 <= \result && n == \old(n)) && m == \old(m))) && ((\old(n) + 1 <= \result && \old(m) == 0) || 1 <= \old(m)) - ProcedureContractResult [Line: 28]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 631 SDslu, 608 SDs, 0 SdLazy, 2387 SolverSat, 375 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 95 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 53 LocationsWithAnnotation, 575 PreInvPairs, 1016 NumberOfFragments, 664 HoareAnnotationTreeSize, 575 FomulaSimplifications, 177269 FormulaSimplificationTreeSizeReduction, 2.8s HoareSimplificationTime, 53 FomulaSimplificationsInter, 6618 FormulaSimplificationTreeSizeReductionInter, 5.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 511 ConstructedInterpolants, 0 QuantifiedInterpolants, 80857 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 388/481 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...