/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 0.2.0-b8ad66e [2020-10-23 18:38:48,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:38:48,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:38:48,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:38:48,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:38:48,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:38:48,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:38:48,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:38:48,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:38:48,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:38:48,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:38:48,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:38:48,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:38:48,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:38:48,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:38:48,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:38:48,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:38:48,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:38:48,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:38:48,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:38:48,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:38:48,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:38:48,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:38:48,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:38:48,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:38:48,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:38:48,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:38:48,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:38:48,784 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 [2020-10-23 18:38:48,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:38:48,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:38:48,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:38:48,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:38:48,873 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:38:48,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:38:48,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:38:48,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:38:48,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:38:48,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:38:48,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:38:48,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:38:48,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:38:48,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:38:48,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:38:48,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:38:48,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:38:48,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:38:48,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:38:48,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:38:48,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:38:48,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:38:48,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:38:48,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:38:48,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:38:48,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:38:48,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:38:48,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:38:48,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:38:48,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:38:49,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:38:49,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:38:49,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:38:49,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:38:49,413 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:38:49,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-10-23 18:38:49,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488530167/02e0ef3b2bbe4af1a8c0fc8d6c45b3a8/FLAGa7b87c161 [2020-10-23 18:38:50,274 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:38:50,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2020-10-23 18:38:50,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488530167/02e0ef3b2bbe4af1a8c0fc8d6c45b3a8/FLAGa7b87c161 [2020-10-23 18:38:50,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488530167/02e0ef3b2bbe4af1a8c0fc8d6c45b3a8 [2020-10-23 18:38:50,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:38:50,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:38:50,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:38:50,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:38:50,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:38:50,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:38:50" (1/1) ... [2020-10-23 18:38:50,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b68fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:50, skipping insertion in model container [2020-10-23 18:38:50,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:38:50" (1/1) ... [2020-10-23 18:38:50,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:38:50,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:38:50,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:38:51,012 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:38:51,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:38:51,159 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:38:51,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51 WrapperNode [2020-10-23 18:38:51,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:38:51,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:38:51,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:38:51,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:38:51,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (1/1) ... [2020-10-23 18:38:51,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:38:51,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:38:51,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:38:51,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:38:51,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (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 [2020-10-23 18:38:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:38:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:38:51,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:38:51,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:38:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:38:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:38:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:38:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:38:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:38:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:38:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:38:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:38:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:38:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:38:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:38:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:38:52,185 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:38:52,185 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-23 18:38:52,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:38:52 BoogieIcfgContainer [2020-10-23 18:38:52,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:38:52,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:38:52,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:38:52,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:38:52,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:38:50" (1/3) ... [2020-10-23 18:38:52,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5c0fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:38:52, skipping insertion in model container [2020-10-23 18:38:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:38:51" (2/3) ... [2020-10-23 18:38:52,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5c0fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:38:52, skipping insertion in model container [2020-10-23 18:38:52,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:38:52" (3/3) ... [2020-10-23 18:38:52,200 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-10-23 18:38:52,214 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:38:52,221 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:38:52,238 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:38:52,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:38:52,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:38:52,273 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:38:52,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:38:52,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:38:52,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:38:52,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:38:52,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:38:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-10-23 18:38:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:38:52,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:52,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:38:52,305 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -122925734, now seen corresponding path program 1 times [2020-10-23 18:38:52,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:52,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102550352] [2020-10-23 18:38:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:52,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:38:52,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102550352] [2020-10-23 18:38:52,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:52,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:38:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089462551] [2020-10-23 18:38:52,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:38:52,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:38:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:38:52,649 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2020-10-23 18:38:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:52,786 INFO L93 Difference]: Finished difference Result 165 states and 304 transitions. [2020-10-23 18:38:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:38:52,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-23 18:38:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:52,825 INFO L225 Difference]: With dead ends: 165 [2020-10-23 18:38:52,825 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 18:38:52,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:38:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 18:38:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 18:38:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 18:38:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 114 transitions. [2020-10-23 18:38:52,929 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 114 transitions. Word has length 14 [2020-10-23 18:38:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:52,930 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 114 transitions. [2020-10-23 18:38:52,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:38:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 114 transitions. [2020-10-23 18:38:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:38:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:52,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:38:52,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:38:52,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:52,938 INFO L82 PathProgramCache]: Analyzing trace with hash -188356260, now seen corresponding path program 1 times [2020-10-23 18:38:52,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:52,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204450651] [2020-10-23 18:38:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:53,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:38:53,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204450651] [2020-10-23 18:38:53,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:53,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:53,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392986471] [2020-10-23 18:38:53,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:53,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:53,115 INFO L87 Difference]: Start difference. First operand 79 states and 114 transitions. Second operand 4 states. [2020-10-23 18:38:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:53,574 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2020-10-23 18:38:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:53,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-23 18:38:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:53,578 INFO L225 Difference]: With dead ends: 155 [2020-10-23 18:38:53,578 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 18:38:53,580 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 [2020-10-23 18:38:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 18:38:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-23 18:38:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 18:38:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2020-10-23 18:38:53,596 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 15 [2020-10-23 18:38:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:53,596 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2020-10-23 18:38:53,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2020-10-23 18:38:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:38:53,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:53,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:38:53,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:38:53,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash -812575593, now seen corresponding path program 1 times [2020-10-23 18:38:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:53,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300380635] [2020-10-23 18:38:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:53,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:38:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300380635] [2020-10-23 18:38:53,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:53,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:53,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090406085] [2020-10-23 18:38:53,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:53,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:53,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:53,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:53,725 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand 4 states. [2020-10-23 18:38:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:54,036 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2020-10-23 18:38:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:54,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:38:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:54,039 INFO L225 Difference]: With dead ends: 162 [2020-10-23 18:38:54,039 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 18:38:54,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:38:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 18:38:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-23 18:38:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 18:38:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2020-10-23 18:38:54,054 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 20 [2020-10-23 18:38:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:54,055 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2020-10-23 18:38:54,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2020-10-23 18:38:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:38:54,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:54,056 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, 1] [2020-10-23 18:38:54,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:38:54,057 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -473983135, now seen corresponding path program 1 times [2020-10-23 18:38:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:54,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855734594] [2020-10-23 18:38:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:38:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855734594] [2020-10-23 18:38:54,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:54,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:38:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331135224] [2020-10-23 18:38:54,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:38:54,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:38:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:38:54,169 INFO L87 Difference]: Start difference. First operand 86 states and 121 transitions. Second operand 5 states. [2020-10-23 18:38:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:55,093 INFO L93 Difference]: Finished difference Result 259 states and 368 transitions. [2020-10-23 18:38:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:38:55,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-23 18:38:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:55,098 INFO L225 Difference]: With dead ends: 259 [2020-10-23 18:38:55,101 INFO L226 Difference]: Without dead ends: 168 [2020-10-23 18:38:55,102 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 [2020-10-23 18:38:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-23 18:38:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-10-23 18:38:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-23 18:38:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 199 transitions. [2020-10-23 18:38:55,124 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 199 transitions. Word has length 23 [2020-10-23 18:38:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:55,124 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 199 transitions. [2020-10-23 18:38:55,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:38:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 199 transitions. [2020-10-23 18:38:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:38:55,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:55,126 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, 1] [2020-10-23 18:38:55,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:38:55,126 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash -645502930, now seen corresponding path program 1 times [2020-10-23 18:38:55,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:55,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632028025] [2020-10-23 18:38:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:55,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:38:55,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632028025] [2020-10-23 18:38:55,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:55,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:55,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136768097] [2020-10-23 18:38:55,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:55,230 INFO L87 Difference]: Start difference. First operand 134 states and 199 transitions. Second operand 4 states. [2020-10-23 18:38:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:55,425 INFO L93 Difference]: Finished difference Result 225 states and 341 transitions. [2020-10-23 18:38:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:55,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:38:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:55,427 INFO L225 Difference]: With dead ends: 225 [2020-10-23 18:38:55,427 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 18:38:55,431 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 [2020-10-23 18:38:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 18:38:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-23 18:38:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-23 18:38:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 143 transitions. [2020-10-23 18:38:55,472 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 143 transitions. Word has length 27 [2020-10-23 18:38:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:55,474 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 143 transitions. [2020-10-23 18:38:55,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 143 transitions. [2020-10-23 18:38:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:38:55,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:55,483 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] [2020-10-23 18:38:55,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:38:55,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:55,486 INFO L82 PathProgramCache]: Analyzing trace with hash -311961296, now seen corresponding path program 1 times [2020-10-23 18:38:55,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:55,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461891615] [2020-10-23 18:38:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:55,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:38:55,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461891615] [2020-10-23 18:38:55,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:55,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:55,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304083105] [2020-10-23 18:38:55,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:55,626 INFO L87 Difference]: Start difference. First operand 98 states and 143 transitions. Second operand 4 states. [2020-10-23 18:38:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:55,995 INFO L93 Difference]: Finished difference Result 184 states and 272 transitions. [2020-10-23 18:38:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:55,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:38:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:56,002 INFO L225 Difference]: With dead ends: 184 [2020-10-23 18:38:56,002 INFO L226 Difference]: Without dead ends: 109 [2020-10-23 18:38:56,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:38:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-23 18:38:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-23 18:38:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 18:38:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2020-10-23 18:38:56,026 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 31 [2020-10-23 18:38:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:56,027 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2020-10-23 18:38:56,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2020-10-23 18:38:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:38:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:56,029 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] [2020-10-23 18:38:56,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:38:56,030 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash 235222489, now seen corresponding path program 1 times [2020-10-23 18:38:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:56,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105975710] [2020-10-23 18:38:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:38:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105975710] [2020-10-23 18:38:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:56,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745628725] [2020-10-23 18:38:56,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:56,166 INFO L87 Difference]: Start difference. First operand 100 states and 137 transitions. Second operand 4 states. [2020-10-23 18:38:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:56,360 INFO L93 Difference]: Finished difference Result 168 states and 231 transitions. [2020-10-23 18:38:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:56,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:38:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:56,364 INFO L225 Difference]: With dead ends: 168 [2020-10-23 18:38:56,364 INFO L226 Difference]: Without dead ends: 93 [2020-10-23 18:38:56,365 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 [2020-10-23 18:38:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-23 18:38:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-23 18:38:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-23 18:38:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-10-23 18:38:56,378 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 32 [2020-10-23 18:38:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:56,378 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-10-23 18:38:56,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-10-23 18:38:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:38:56,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:56,385 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] [2020-10-23 18:38:56,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:38:56,385 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 167233998, now seen corresponding path program 1 times [2020-10-23 18:38:56,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:56,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894384969] [2020-10-23 18:38:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:38:56,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894384969] [2020-10-23 18:38:56,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:56,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:56,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264118927] [2020-10-23 18:38:56,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:56,464 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 4 states. [2020-10-23 18:38:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:56,724 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2020-10-23 18:38:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:56,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:38:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:56,726 INFO L225 Difference]: With dead ends: 139 [2020-10-23 18:38:56,726 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:38:56,727 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 [2020-10-23 18:38:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:38:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:38:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:38:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2020-10-23 18:38:56,736 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 32 [2020-10-23 18:38:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:56,736 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2020-10-23 18:38:56,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2020-10-23 18:38:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:38:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:38:56,738 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, 1] [2020-10-23 18:38:56,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:38:56,738 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:38:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:38:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1193122916, now seen corresponding path program 1 times [2020-10-23 18:38:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:38:56,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297863075] [2020-10-23 18:38:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:38:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:38:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:38:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:38:56,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297863075] [2020-10-23 18:38:56,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:38:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:38:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304962663] [2020-10-23 18:38:56,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:38:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:38:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:38:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:38:56,821 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 4 states. [2020-10-23 18:38:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:38:57,024 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2020-10-23 18:38:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:38:57,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-23 18:38:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:38:57,026 INFO L225 Difference]: With dead ends: 112 [2020-10-23 18:38:57,026 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:38:57,027 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 [2020-10-23 18:38:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:38:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:38:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:38:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:38:57,028 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-23 18:38:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:38:57,029 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:38:57,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:38:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:38:57,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:38:57,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:38:57,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:38:57,222 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 14 [2020-10-23 18:38:57,489 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-23 18:38:57,495 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:38:57,495 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:38:57,496 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:38:57,496 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:38:57,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:38:57,496 INFO L270 CegarLoopResult]: 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)|)) [2020-10-23 18:38:57,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:38:57,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:38:57,496 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:38:57,496 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L250(lines 250 265) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 392) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L118(lines 118 133) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L52(lines 52 63) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L366(lines 366 381) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L234(lines 234 249) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L168(lines 168 179) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L102(lines 102 117) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-10-23 18:38:57,497 INFO L270 CegarLoopResult]: 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))) [2020-10-23 18:38:57,497 INFO L274 CegarLoopResult]: For program point L350(lines 350 365) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L218(lines 218 233) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L185(lines 185 284) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L152(lines 152 163) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L334(lines 334 349) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L268(lines 268 279) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L202(lines 202 217) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L136(lines 136 147) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L318(lines 318 333) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L285(lines 285 384) no Hoare annotation was computed. [2020-10-23 18:38:57,498 INFO L274 CegarLoopResult]: For program point L252(lines 252 263) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L186(lines 186 201) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L120(lines 120 131) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L368(lines 368 379) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L302(lines 302 317) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 392) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L236(lines 236 247) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L104(lines 104 115) no Hoare annotation was computed. [2020-10-23 18:38:57,499 INFO L274 CegarLoopResult]: For program point L352(lines 352 363) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L286(lines 286 301) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L220(lines 220 231) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L88(lines 88 90) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L336(lines 336 347) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L204(lines 204 215) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L72(lines 72 74) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L320(lines 320 331) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L188(lines 188 199) no Hoare annotation was computed. [2020-10-23 18:38:57,500 INFO L274 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L304(lines 304 315) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L172(lines 172 174) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L288(lines 288 299) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L156(lines 156 158) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L270 CegarLoopResult]: 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))) [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L24-3(lines 24 387) no Hoare annotation was computed. [2020-10-23 18:38:57,501 INFO L274 CegarLoopResult]: For program point L272(lines 272 274) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L140(lines 140 142) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L256(lines 256 258) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L124(lines 124 126) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L372(lines 372 374) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L240(lines 240 242) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L108(lines 108 110) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L356(lines 356 358) no Hoare annotation was computed. [2020-10-23 18:38:57,502 INFO L274 CegarLoopResult]: For program point L224(lines 224 226) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L270 CegarLoopResult]: At program point L373(lines 15 392) the Hoare annotation is: false [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L340(lines 340 342) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L208(lines 208 210) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L324(lines 324 326) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L192(lines 192 194) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L308(lines 308 310) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L391(line 391) no Hoare annotation was computed. [2020-10-23 18:38:57,503 INFO L274 CegarLoopResult]: For program point L292(lines 292 294) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L29(lines 29 48) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L30(lines 30 45) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 15 392) the Hoare annotation is: true [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L32(lines 32 43) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L82(lines 82 97) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L49(lines 49 100) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L66(lines 66 81) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L50(lines 50 65) no Hoare annotation was computed. [2020-10-23 18:38:57,504 INFO L274 CegarLoopResult]: For program point L166(lines 166 181) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L150(lines 150 165) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L84(lines 84 95) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L266(lines 266 281) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L134(lines 134 149) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L101(lines 101 184) no Hoare annotation was computed. [2020-10-23 18:38:57,505 INFO L274 CegarLoopResult]: For program point L68(lines 68 79) no Hoare annotation was computed. [2020-10-23 18:38:57,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:38:57 BoogieIcfgContainer [2020-10-23 18:38:57,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:38:57,529 INFO L168 Benchmark]: Toolchain (without parser) took 6907.93 ms. Allocated memory was 164.6 MB in the beginning and 205.5 MB in the end (delta: 40.9 MB). Free memory was 139.8 MB in the beginning and 166.7 MB in the end (delta: -26.9 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:38:57,530 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 164.6 MB. Free memory was 136.4 MB in the beginning and 136.3 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:38:57,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.76 ms. Allocated memory is still 164.6 MB. Free memory was 139.1 MB in the beginning and 127.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:38:57,531 INFO L168 Benchmark]: Boogie Preprocessor took 67.64 ms. Allocated memory is still 164.6 MB. Free memory was 127.3 MB in the beginning and 125.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:38:57,532 INFO L168 Benchmark]: RCFGBuilder took 955.05 ms. Allocated memory is still 164.6 MB. Free memory was 125.3 MB in the beginning and 128.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:38:57,533 INFO L168 Benchmark]: TraceAbstraction took 5336.29 ms. Allocated memory was 164.6 MB in the beginning and 205.5 MB in the end (delta: 40.9 MB). Free memory was 127.6 MB in the beginning and 166.7 MB in the end (delta: -39.1 MB). Peak memory consumption was 98.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:38:57,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 164.6 MB. Free memory was 136.4 MB in the beginning and 136.3 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 529.76 ms. Allocated memory is still 164.6 MB. Free memory was 139.1 MB in the beginning and 127.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.64 ms. Allocated memory is still 164.6 MB. Free memory was 127.3 MB in the beginning and 125.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 955.05 ms. Allocated memory is still 164.6 MB. Free memory was 125.3 MB in the beginning and 128.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5336.29 ms. Allocated memory was 164.6 MB in the beginning and 205.5 MB in the end (delta: 40.9 MB). Free memory was 127.6 MB in the beginning and 166.7 MB in the end (delta: -39.1 MB). Peak memory consumption was 98.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() 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, 87 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 916 SDtfs, 1171 SDslu, 66 SDs, 0 SdLazy, 806 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred 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: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 44 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 16 PreInvPairs, 22 NumberOfFragments, 95 HoareAnnotationTreeSize, 16 FomulaSimplifications, 106 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 354 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 219 ConstructedInterpolants, 0 QuantifiedInterpolants, 19401 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...