/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:36:33,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:36:33,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:36:33,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:36:33,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:36:33,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:36:33,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:36:33,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:36:33,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:36:33,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:36:33,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:36:33,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:36:33,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:36:33,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:36:33,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:36:33,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:36:33,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:36:33,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:36:33,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:36:33,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:36:33,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:36:33,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:36:33,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:36:33,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:36:33,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:36:33,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:36:33,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:36:33,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:36:33,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:36:33,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 20:36:33,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:36:33,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:36:33,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:36:33,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:36:33,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:36:33,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:36:33,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:36:33,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:36:33,218 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:36:33,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:36:33,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:36:33,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:36:33,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:36:33,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:36:33,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:36:33,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:36:33,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:36:33,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:36:33,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:36:33,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:36:33,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:36:33,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:36:33,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:36:33,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:36:33,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:36:33,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:36:33,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:36:33,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:36:33,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:36:33,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:36:33,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:36:33,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:36:33,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:36:33,223 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-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:36:33,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:36:33,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:36:33,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:36:33,610 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:36:33,612 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:36:33,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-27 20:36:33,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd326f0c2/058bcb5254234a61b2a05c9fd1d311c2/FLAG30d394f24 [2020-10-27 20:36:34,265 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:36:34,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-27 20:36:34,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd326f0c2/058bcb5254234a61b2a05c9fd1d311c2/FLAG30d394f24 [2020-10-27 20:36:34,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd326f0c2/058bcb5254234a61b2a05c9fd1d311c2 [2020-10-27 20:36:34,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:36:34,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:36:34,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:34,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:36:34,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:36:34,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a66496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34, skipping insertion in model container [2020-10-27 20:36:34,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:36:34,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:36:34,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:34,856 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:36:34,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:34,891 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:36:34,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34 WrapperNode [2020-10-27 20:36:34,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:34,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:36:34,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:36:34,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:36:34,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... [2020-10-27 20:36:34,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:36:34,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:36:34,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:36:34,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:36:34,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 20:36:35,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:36:35,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:36:35,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:36:35,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:36:35,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:36:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:36:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:36:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:36:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:36:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:36:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:36:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:36:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:36:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:36:35,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:36:35,293 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:36:35,294 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:36:35,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:35 BoogieIcfgContainer [2020-10-27 20:36:35,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:36:35,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:36:35,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:36:35,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:36:35,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:36:34" (1/3) ... [2020-10-27 20:36:35,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b1586f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:35, skipping insertion in model container [2020-10-27 20:36:35,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:34" (2/3) ... [2020-10-27 20:36:35,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b1586f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:35, skipping insertion in model container [2020-10-27 20:36:35,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:35" (3/3) ... [2020-10-27 20:36:35,309 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-27 20:36:35,325 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:36:35,331 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:36:35,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:36:35,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:36:35,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:36:35,401 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:36:35,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:36:35,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:36:35,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:36:35,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:36:35,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:36:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:36:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:35,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:35,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:35,446 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-27 20:36:35,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:35,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847579450] [2020-10-27 20:36:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:35,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:35,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:35,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:35,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 20:36:35,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:35,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:36:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:36,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:36,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:36,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:36,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:36:36,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:36,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847579450] [2020-10-27 20:36:36,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:36,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:36:36,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51349070] [2020-10-27 20:36:36,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:36:36,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:36:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:36:36,157 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:36:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:36,245 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-27 20:36:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:36:36,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:36:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:36,255 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:36:36,255 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:36:36,258 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 [2020-10-27 20:36:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:36:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:36:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:36:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:36:36,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-27 20:36:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:36,298 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:36:36,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:36:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:36:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:36,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:36,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:36,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:36:36,300 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-10-27 20:36:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:36,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746380288] [2020-10-27 20:36:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:36,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:36,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 20:36:36,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:36:36,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:36,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:36:36,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:36,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:36,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:36,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746380288] [2020-10-27 20:36:36,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:36:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787415797] [2020-10-27 20:36:36,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:36:36,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:36,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:36:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:36:36,620 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-27 20:36:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:36,856 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-27 20:36:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:36:36,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 20:36:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:36,858 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:36:36,858 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:36:36,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:36:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:36:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:36:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:36:36,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-27 20:36:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:36,869 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:36:36,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:36:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:36:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:36:36,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:36,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:36,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:36:36,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-27 20:36:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:36,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410414094] [2020-10-27 20:36:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:36,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:36:36,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:36,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 20:36:36,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:36,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:36,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:36:36,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:37,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:37,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:37,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:37,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:37,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410414094] [2020-10-27 20:36:37,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:36:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787512138] [2020-10-27 20:36:37,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:36:37,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:36:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:36:37,080 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-27 20:36:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:37,181 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-27 20:36:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:36:37,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:36:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:37,183 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:36:37,184 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:36:37,184 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 [2020-10-27 20:36:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:36:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:36:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:36:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 20:36:37,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-27 20:36:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:37,192 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 20:36:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:36:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 20:36:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:36:37,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:37,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:37,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:36:37,193 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -12578408, now seen corresponding path program 1 times [2020-10-27 20:36:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:37,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212359156] [2020-10-27 20:36:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:37,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:36:37,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:37,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 20:36:37,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:37,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:36:37,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:37,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:36:37,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:37,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:37,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:37,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:36:37,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:37,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212359156] [2020-10-27 20:36:37,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:37,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:36:37,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728954040] [2020-10-27 20:36:37,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:36:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:37,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:36:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:37,512 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-10-27 20:36:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:37,932 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-27 20:36:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:36:37,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-27 20:36:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:37,934 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:36:37,934 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:36:37,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:36:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:36:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:36:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:36:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:36:37,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-27 20:36:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:37,942 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:36:37,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:36:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:36:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:36:37,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:37,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:37,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:36:37,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1519012857, now seen corresponding path program 1 times [2020-10-27 20:36:37,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:37,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704664572] [2020-10-27 20:36:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:37,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:36:38,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:36:38,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:38,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:36:38,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:38,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704664572] [2020-10-27 20:36:38,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:38,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:36:38,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278971140] [2020-10-27 20:36:38,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:36:38,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:36:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:38,101 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-27 20:36:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:38,249 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 20:36:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:36:38,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 20:36:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:38,250 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:36:38,250 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:36:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:36:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 20:36:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:36:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 20:36:38,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-27 20:36:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:38,257 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 20:36:38,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:36:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 20:36:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:36:38,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:38,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:38,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:36:38,259 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2095896069, now seen corresponding path program 2 times [2020-10-27 20:36:38,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:38,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473829462] [2020-10-27 20:36:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:36:38,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 20:36:38,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:36:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:36:38,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:38,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:38,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:38,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:36:38,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473829462] [2020-10-27 20:36:38,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:38,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:36:38,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13876585] [2020-10-27 20:36:38,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:36:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:36:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:36:38,742 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-10-27 20:36:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:39,301 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-27 20:36:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:36:39,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-27 20:36:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:39,303 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:36:39,303 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:36:39,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:36:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:36:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:36:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:36:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 20:36:39,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-10-27 20:36:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:39,312 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 20:36:39,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:36:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 20:36:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:36:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:39,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:39,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:36:39,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:39,314 INFO L82 PathProgramCache]: Analyzing trace with hash -319998794, now seen corresponding path program 2 times [2020-10-27 20:36:39,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:39,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901779488] [2020-10-27 20:36:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:39,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:36:39,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:39,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 20:36:39,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:36:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:36:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:39,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:39,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:39,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:39,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:39,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:39,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:39,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:39,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901779488] [2020-10-27 20:36:39,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:39,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:36:39,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316746088] [2020-10-27 20:36:39,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:36:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:36:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:36:39,459 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-27 20:36:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:39,610 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-27 20:36:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:36:39,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 20:36:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:39,613 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:36:39,613 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:36:39,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:36:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 20:36:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:36:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 20:36:39,625 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-27 20:36:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:39,625 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 20:36:39,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:36:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 20:36:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:36:39,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:39,626 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:39,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:36:39,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash 286734041, now seen corresponding path program 3 times [2020-10-27 20:36:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:39,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503684812] [2020-10-27 20:36:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:36:39,643 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:36:39,643 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:36:39,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:36:39,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:36:39 BoogieIcfgContainer [2020-10-27 20:36:39,662 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:36:39,665 INFO L168 Benchmark]: Toolchain (without parser) took 5024.86 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.2 MB in the beginning and 119.2 MB in the end (delta: 14.0 MB). Peak memory consumption was 47.5 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:39,665 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 158.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:36:39,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.75 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 122.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:39,667 INFO L168 Benchmark]: Boogie Preprocessor took 36.38 ms. Allocated memory is still 158.3 MB. Free memory was 122.9 MB in the beginning and 121.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:39,668 INFO L168 Benchmark]: RCFGBuilder took 366.43 ms. Allocated memory is still 158.3 MB. Free memory was 121.5 MB in the beginning and 108.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:39,669 INFO L168 Benchmark]: TraceAbstraction took 4363.01 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 108.1 MB in the beginning and 119.2 MB in the end (delta: -11.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:39,672 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 158.3 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.75 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 122.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.38 ms. Allocated memory is still 158.3 MB. Free memory was 122.9 MB in the beginning and 121.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.43 ms. Allocated memory is still 158.3 MB. Free memory was 121.5 MB in the beginning and 108.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4363.01 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 108.1 MB in the beginning and 119.2 MB in the end (delta: -11.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01_bug02_sum01_bug02_base.case.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 105 SDslu, 120 SDs, 0 SdLazy, 251 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 8139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 10/24 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 incorrect! Received shutdown request...