/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:54:54,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:54:54,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:54:54,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:54:54,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:54:54,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:54:54,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:54:54,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:54:54,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:54:54,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:54:54,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:54:54,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:54:54,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:54:54,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:54:54,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:54:54,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:54:54,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:54:54,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:54:54,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:54:54,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:54:54,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:54:54,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:54:54,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:54:54,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:54:54,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:54:54,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:54:54,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:54:54,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:54:54,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:54:54,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:54:54,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:54:54,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:54:54,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:54:54,265 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:54:54,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:54:54,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:54:54,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:54:54,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:54:54,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:54:54,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:54:54,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:54:54,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:54:54,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:54:54,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:54:54,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:54:54,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:54:54,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:54:54,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:54:54,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:54:54,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:54:54,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:54:54,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:54:54,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:54:54,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:54:54,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:54:54,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:54:54,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:54:54,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:54:54,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:54:54,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:54:54,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:54:54,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:54:54,701 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:54:54,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2021-02-19 17:54:54,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa93855/a114159ee99d4a52bb002c5edd33e4a2/FLAGcaa3f7d65 [2021-02-19 17:54:55,460 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:54:55,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2021-02-19 17:54:55,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa93855/a114159ee99d4a52bb002c5edd33e4a2/FLAGcaa3f7d65 [2021-02-19 17:54:55,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa93855/a114159ee99d4a52bb002c5edd33e4a2 [2021-02-19 17:54:55,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:54:55,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:54:55,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:54:55,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:54:55,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:54:55,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:54:55" (1/1) ... [2021-02-19 17:54:55,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1515f4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:55, skipping insertion in model container [2021-02-19 17:54:55,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:54:55" (1/1) ... [2021-02-19 17:54:55,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:54:55,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:54:56,065 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c[12744,12757] [2021-02-19 17:54:56,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:54:56,082 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:54:56,129 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c[12744,12757] [2021-02-19 17:54:56,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:54:56,168 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:54:56,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56 WrapperNode [2021-02-19 17:54:56,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:54:56,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:54:56,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:54:56,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:54:56,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (1/1) ... [2021-02-19 17:54:56,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:54:56,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:54:56,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:54:56,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:54:56,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (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 [2021-02-19 17:54:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:54:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:54:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:54:56,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:54:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:54:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:54:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:54:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:54:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:54:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:54:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:54:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:54:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:54:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:54:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:54:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:54:57,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:54:57,274 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-02-19 17:54:57,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:54:57 BoogieIcfgContainer [2021-02-19 17:54:57,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:54:57,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:54:57,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:54:57,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:54:57,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:54:55" (1/3) ... [2021-02-19 17:54:57,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25185e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:54:57, skipping insertion in model container [2021-02-19 17:54:57,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:54:56" (2/3) ... [2021-02-19 17:54:57,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25185e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:54:57, skipping insertion in model container [2021-02-19 17:54:57,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:54:57" (3/3) ... [2021-02-19 17:54:57,288 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2021-02-19 17:54:57,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:54:57,301 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:54:57,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:54:57,360 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:54:57,360 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:54:57,360 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:54:57,360 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:54:57,361 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:54:57,361 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:54:57,361 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:54:57,361 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:54:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2021-02-19 17:54:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:54:57,396 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:54:57,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:57,397 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:54:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1578471454, now seen corresponding path program 1 times [2021-02-19 17:54:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863604036] [2021-02-19 17:54:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:57,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:57,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:54:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:57,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:57,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863604036] [2021-02-19 17:54:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:54:57,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890662821] [2021-02-19 17:54:57,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:54:57,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:54:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:54:57,770 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2021-02-19 17:54:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:57,878 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2021-02-19 17:54:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:54:57,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-02-19 17:54:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:57,904 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:54:57,904 INFO L226 Difference]: Without dead ends: 78 [2021-02-19 17:54:57,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:54:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-19 17:54:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-19 17:54:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-19 17:54:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2021-02-19 17:54:57,966 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2021-02-19 17:54:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:57,967 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2021-02-19 17:54:57,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 17:54:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2021-02-19 17:54:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:54:57,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:54:57,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:57,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:54:57,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:54:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2074500547, now seen corresponding path program 1 times [2021-02-19 17:54:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863779511] [2021-02-19 17:54:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:58,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:54:58,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:54:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:58,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:58,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863779511] [2021-02-19 17:54:58,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:58,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:54:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627294631] [2021-02-19 17:54:58,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:54:58,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:54:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:54:58,137 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 4 states. [2021-02-19 17:54:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:58,495 INFO L93 Difference]: Finished difference Result 153 states and 224 transitions. [2021-02-19 17:54:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:54:58,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-02-19 17:54:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:58,498 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:54:58,498 INFO L226 Difference]: Without dead ends: 81 [2021-02-19 17:54:58,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-19 17:54:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-02-19 17:54:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-19 17:54:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2021-02-19 17:54:58,515 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 14 [2021-02-19 17:54:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:58,515 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2021-02-19 17:54:58,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:54:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2021-02-19 17:54:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:54:58,517 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:54:58,517 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:58,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:54:58,518 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:54:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2049230431, now seen corresponding path program 1 times [2021-02-19 17:54:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:58,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64628393] [2021-02-19 17:54:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:58,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:54:58,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:54:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:58,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64628393] [2021-02-19 17:54:58,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:58,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:54:58,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786905230] [2021-02-19 17:54:58,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:54:58,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:54:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:54:58,621 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand 4 states. [2021-02-19 17:54:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:58,903 INFO L93 Difference]: Finished difference Result 161 states and 233 transitions. [2021-02-19 17:54:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:54:58,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:54:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:58,908 INFO L225 Difference]: With dead ends: 161 [2021-02-19 17:54:58,908 INFO L226 Difference]: Without dead ends: 87 [2021-02-19 17:54:58,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-19 17:54:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-02-19 17:54:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-19 17:54:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2021-02-19 17:54:58,941 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 19 [2021-02-19 17:54:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:58,941 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2021-02-19 17:54:58,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:54:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2021-02-19 17:54:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:54:58,943 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:54:58,943 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:58,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:54:58,944 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:54:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash 889958168, now seen corresponding path program 1 times [2021-02-19 17:54:58,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:58,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995423548] [2021-02-19 17:54:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:54:59,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:54:59,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:54:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:59,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995423548] [2021-02-19 17:54:59,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:59,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:54:59,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364433745] [2021-02-19 17:54:59,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:54:59,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:54:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:54:59,140 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand 5 states. [2021-02-19 17:54:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:59,724 INFO L93 Difference]: Finished difference Result 258 states and 366 transitions. [2021-02-19 17:54:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:54:59,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-02-19 17:54:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:59,728 INFO L225 Difference]: With dead ends: 258 [2021-02-19 17:54:59,728 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:54:59,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:54:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:54:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2021-02-19 17:54:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-02-19 17:54:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 198 transitions. [2021-02-19 17:54:59,776 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 198 transitions. Word has length 22 [2021-02-19 17:54:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:59,777 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 198 transitions. [2021-02-19 17:54:59,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 17:54:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 198 transitions. [2021-02-19 17:54:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:54:59,781 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:54:59,781 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:59,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:54:59,782 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:54:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1337215083, now seen corresponding path program 1 times [2021-02-19 17:54:59,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:59,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147412840] [2021-02-19 17:54:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:54:59,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:54:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:59,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:59,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:54:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:54:59,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147412840] [2021-02-19 17:54:59,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:54:59,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:54:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541270864] [2021-02-19 17:54:59,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:54:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:59,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:54:59,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:54:59,924 INFO L87 Difference]: Start difference. First operand 133 states and 198 transitions. Second operand 4 states. [2021-02-19 17:55:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:00,061 INFO L93 Difference]: Finished difference Result 223 states and 339 transitions. [2021-02-19 17:55:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:00,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:55:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:00,067 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:55:00,068 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:55:00,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:55:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-02-19 17:55:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-19 17:55:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2021-02-19 17:55:00,096 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 26 [2021-02-19 17:55:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:00,097 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2021-02-19 17:55:00,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:55:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2021-02-19 17:55:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:00,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:55:00,101 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-19 17:55:00,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:55:00,101 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:55:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:00,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1725888791, now seen corresponding path program 1 times [2021-02-19 17:55:00,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:00,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819013293] [2021-02-19 17:55:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:55:00,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:55:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:00,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819013293] [2021-02-19 17:55:00,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:00,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:55:00,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522634165] [2021-02-19 17:55:00,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:00,252 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand 4 states. [2021-02-19 17:55:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:00,523 INFO L93 Difference]: Finished difference Result 183 states and 270 transitions. [2021-02-19 17:55:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:00,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-19 17:55:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:00,526 INFO L225 Difference]: With dead ends: 183 [2021-02-19 17:55:00,526 INFO L226 Difference]: Without dead ends: 109 [2021-02-19 17:55:00,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-19 17:55:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-02-19 17:55:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-19 17:55:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2021-02-19 17:55:00,536 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 30 [2021-02-19 17:55:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:00,537 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2021-02-19 17:55:00,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:55:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2021-02-19 17:55:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:55:00,539 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:55:00,539 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-19 17:55:00,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:55:00,539 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:55:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash -812111649, now seen corresponding path program 1 times [2021-02-19 17:55:00,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:00,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966810169] [2021-02-19 17:55:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:55:00,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:55:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:00,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966810169] [2021-02-19 17:55:00,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:00,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:55:00,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670879189] [2021-02-19 17:55:00,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:00,626 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand 4 states. [2021-02-19 17:55:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:00,812 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2021-02-19 17:55:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:00,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-19 17:55:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:00,813 INFO L225 Difference]: With dead ends: 166 [2021-02-19 17:55:00,813 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:55:00,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:55:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-02-19 17:55:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-02-19 17:55:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-02-19 17:55:00,823 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 31 [2021-02-19 17:55:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:00,823 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-02-19 17:55:00,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:55:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-02-19 17:55:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:55:00,824 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:55:00,825 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-19 17:55:00,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:55:00,825 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:55:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -675757494, now seen corresponding path program 1 times [2021-02-19 17:55:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:00,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136294052] [2021-02-19 17:55:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 17:55:00,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:55:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:00,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:00,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:00,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136294052] [2021-02-19 17:55:00,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:00,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:55:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642630646] [2021-02-19 17:55:00,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:00,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:00,902 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 4 states. [2021-02-19 17:55:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:01,066 INFO L93 Difference]: Finished difference Result 137 states and 180 transitions. [2021-02-19 17:55:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:01,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-19 17:55:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:01,067 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:55:01,067 INFO L226 Difference]: Without dead ends: 70 [2021-02-19 17:55:01,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-19 17:55:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-02-19 17:55:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-02-19 17:55:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2021-02-19 17:55:01,074 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2021-02-19 17:55:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:01,074 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2021-02-19 17:55:01,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:55:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2021-02-19 17:55:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 17:55:01,077 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:55:01,077 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-19 17:55:01,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:55:01,077 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:55:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1790657828, now seen corresponding path program 1 times [2021-02-19 17:55:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:01,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961461182] [2021-02-19 17:55:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:01,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:01,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:01,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:01,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 17:55:01,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:01,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:55:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:01,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:01,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:55:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961461182] [2021-02-19 17:55:01,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:01,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:55:01,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734026284] [2021-02-19 17:55:01,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:01,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:01,155 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 4 states. [2021-02-19 17:55:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:01,325 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-02-19 17:55:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:01,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2021-02-19 17:55:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:01,326 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:55:01,326 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:55:01,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:55:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:55:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:55:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:55:01,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-02-19 17:55:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:01,330 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:55:01,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:55:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:55:01,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:55:01,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:55:01,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:55:01,708 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2021-02-19 17:55:01,713 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-19 17:55:01,713 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-19 17:55:01,713 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-19 17:55:01,713 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:55:01,715 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= ~m_update~0 |old(~m_update~0)|) (= ~m_initSign~0 |old(~m_initSign~0)|) (= |old(#length)| |#length|) (= ~m_sign~0 |old(~m_sign~0)|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~m_verify~0 |old(~m_verify~0)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~m_Signature~0 |old(~m_Signature~0)|) (= ~m_initVerify~0 |old(~m_initVerify~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2021-02-19 17:55:01,715 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:55:01,715 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:55:01,716 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point L250(lines 250 265) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 15 392) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point L118(lines 118 133) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point L52(lines 52 63) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point L366(lines 366 381) no Hoare annotation was computed. [2021-02-19 17:55:01,716 INFO L189 CegarLoopUtils]: For program point L234(lines 234 249) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L168(lines 168 179) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L102(lines 102 117) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L185 CegarLoopUtils]: At program point L383(lines 24 387) the Hoare annotation is: (or (= main_~q~0 0) (and (= main_~q~0 3) (= 2 main_~this_state~0)) (and (= 0 main_~this_state~0) (= main_~q~0 2)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0))) [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L350(lines 350 365) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L218(lines 218 233) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L185(lines 185 284) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L152(lines 152 163) no Hoare annotation was computed. [2021-02-19 17:55:01,717 INFO L189 CegarLoopUtils]: For program point L334(lines 334 349) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L268(lines 268 279) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L202(lines 202 217) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L136(lines 136 147) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L318(lines 318 333) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L285(lines 285 384) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L252(lines 252 263) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L186(lines 186 201) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L120(lines 120 131) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L368(lines 368 379) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point L302(lines 302 317) no Hoare annotation was computed. [2021-02-19 17:55:01,718 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 15 392) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L236(lines 236 247) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L104(lines 104 115) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L352(lines 352 363) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L286(lines 286 301) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L220(lines 220 231) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L88(lines 88 90) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L336(lines 336 347) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L204(lines 204 215) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L72(lines 72 74) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L320(lines 320 331) no Hoare annotation was computed. [2021-02-19 17:55:01,719 INFO L189 CegarLoopUtils]: For program point L188(lines 188 199) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L56(lines 56 58) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L304(lines 304 315) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L172(lines 172 174) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L288(lines 288 299) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L156(lines 156 158) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L185 CegarLoopUtils]: At program point L24-2(lines 24 387) the Hoare annotation is: (or (and (not (= 2 main_~this_state~0)) (= main_~q~0 0)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0))) [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L24-3(lines 24 387) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L272(lines 272 274) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L140(lines 140 142) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L256(lines 256 258) no Hoare annotation was computed. [2021-02-19 17:55:01,720 INFO L189 CegarLoopUtils]: For program point L124(lines 124 126) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L372(lines 372 374) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L240(lines 240 242) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L108(lines 108 110) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L356(lines 356 358) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L224(lines 224 226) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L185 CegarLoopUtils]: At program point L373(lines 15 392) the Hoare annotation is: false [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L340(lines 340 342) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L208(lines 208 210) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L324(lines 324 326) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L192(lines 192 194) no Hoare annotation was computed. [2021-02-19 17:55:01,721 INFO L189 CegarLoopUtils]: For program point L308(lines 308 310) no Hoare annotation was computed. [2021-02-19 17:55:01,722 INFO L189 CegarLoopUtils]: For program point L292(lines 292 294) no Hoare annotation was computed. [2021-02-19 17:55:01,722 INFO L189 CegarLoopUtils]: For program point L29(lines 29 48) no Hoare annotation was computed. [2021-02-19 17:55:01,722 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 391) no Hoare annotation was computed. [2021-02-19 17:55:01,726 INFO L189 CegarLoopUtils]: For program point L30(lines 30 45) no Hoare annotation was computed. [2021-02-19 17:55:01,726 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 15 392) the Hoare annotation is: true [2021-02-19 17:55:01,726 INFO L189 CegarLoopUtils]: For program point L32(lines 32 43) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L82(lines 82 97) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L49(lines 49 100) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L66(lines 66 81) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L50(lines 50 65) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L166(lines 166 181) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L150(lines 150 165) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L84(lines 84 95) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L266(lines 266 281) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L134(lines 134 149) no Hoare annotation was computed. [2021-02-19 17:55:01,727 INFO L189 CegarLoopUtils]: For program point L101(lines 101 184) no Hoare annotation was computed. [2021-02-19 17:55:01,728 INFO L189 CegarLoopUtils]: For program point L68(lines 68 79) no Hoare annotation was computed. [2021-02-19 17:55:01,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:55:01 BoogieIcfgContainer [2021-02-19 17:55:01,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:55:01,751 INFO L168 Benchmark]: Toolchain (without parser) took 5932.17 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 147.4 MB in the beginning and 170.3 MB in the end (delta: -22.8 MB). Peak memory consumption was 122.9 MB. Max. memory is 8.0 GB. [2021-02-19 17:55:01,754 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 173.0 MB. Free memory is still 146.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:55:01,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.22 ms. Allocated memory is still 173.0 MB. Free memory was 146.4 MB in the beginning and 134.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:55:01,757 INFO L168 Benchmark]: Boogie Preprocessor took 116.80 ms. Allocated memory is still 173.0 MB. Free memory was 134.3 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:55:01,758 INFO L168 Benchmark]: RCFGBuilder took 983.64 ms. Allocated memory is still 173.0 MB. Free memory was 132.2 MB in the beginning and 102.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:55:01,760 INFO L168 Benchmark]: TraceAbstraction took 4470.89 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 102.3 MB in the beginning and 170.3 MB in the end (delta: -67.9 MB). Peak memory consumption was 77.8 MB. Max. memory is 8.0 GB. [2021-02-19 17:55:01,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 173.0 MB. Free memory is still 146.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 339.22 ms. Allocated memory is still 173.0 MB. Free memory was 146.4 MB in the beginning and 134.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 116.80 ms. Allocated memory is still 173.0 MB. Free memory was 134.3 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 983.64 ms. Allocated memory is still 173.0 MB. Free memory was 132.2 MB in the beginning and 102.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4470.89 ms. Allocated memory was 173.0 MB in the beginning and 224.4 MB in the end (delta: 51.4 MB). Free memory was 102.3 MB in the beginning and 170.3 MB in the end (delta: -67.9 MB). Peak memory consumption was 77.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 391]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (!(2 == this_state) && q == 0) || (4 <= q && 3 == this_state) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((q == 0 || (q == 3 && 2 == this_state)) || (0 == this_state && q == 2)) || (4 <= q && 3 == this_state) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 908 SDtfs, 1177 SDslu, 55 SDs, 0 SdLazy, 805 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 47 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 13 NumberOfFragments, 94 HoareAnnotationTreeSize, 7 FomulaSimplifications, 106 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 354 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 18425 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 43/43 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...