/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:30,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:30,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:30,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:30,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:30,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:30,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:30,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:30,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:30,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:30,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:30,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:30,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:30,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:30,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:30,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:30,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:30,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:30,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:30,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:30,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:30,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:30,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:30,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:30,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 17:20:30,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:30,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:30,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:30,261 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 [2020-09-24 17:20:30,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:30,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:30,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:30,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:30,313 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:30,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:30,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:30,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:30,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:30,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:30,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:30,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:30,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:30,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:30,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:30,317 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:30,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:30,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:30,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:30,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:30,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:30,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:30,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:30,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:30,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:30,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:30,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:30,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:30,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:30,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:20:30,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:30,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:30,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:30,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:30,843 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:30,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 17:20:30,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0d74cc7/6734d20e7155408386af95d4563c874d/FLAGc3633c166 [2020-09-24 17:20:31,454 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:31,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 17:20:31,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0d74cc7/6734d20e7155408386af95d4563c874d/FLAGc3633c166 [2020-09-24 17:20:31,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0d74cc7/6734d20e7155408386af95d4563c874d [2020-09-24 17:20:31,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:31,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:31,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:31,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:31,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:31,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31, skipping insertion in model container [2020-09-24 17:20:31,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:31,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:32,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:32,072 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:32,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:32,106 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:32,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32 WrapperNode [2020-09-24 17:20:32,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:32,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:32,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:32,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:32,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:32,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:32,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:32,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:32,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (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 [2020-09-24 17:20:32,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 17:20:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:32,525 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:32,525 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:20:32,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:32 BoogieIcfgContainer [2020-09-24 17:20:32,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:32,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:32,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:32,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:32,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:31" (1/3) ... [2020-09-24 17:20:32,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358ebef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:32, skipping insertion in model container [2020-09-24 17:20:32,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (2/3) ... [2020-09-24 17:20:32,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358ebef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:32, skipping insertion in model container [2020-09-24 17:20:32,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:32" (3/3) ... [2020-09-24 17:20:32,570 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-24 17:20:32,601 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:32,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:32,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:32,681 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:32,682 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:32,682 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:32,682 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:32,682 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:32,682 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:32,683 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:32,683 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 17:20:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 17:20:32,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-24 17:20:32,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838154445] [2020-09-24 17:20:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,056 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:20:33,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:33,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-09-24 17:20:33,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:20:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:33,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,095 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:20:33,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:33,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838154445] [2020-09-24 17:20:33,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:33,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 17:20:33,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721956312] [2020-09-24 17:20:33,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 17:20:33,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 17:20:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:33,137 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-24 17:20:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:33,167 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-24 17:20:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 17:20:33,169 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 17:20:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:33,180 INFO L225 Difference]: With dead ends: 38 [2020-09-24 17:20:33,180 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 17:20:33,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 17:20:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 17:20:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 17:20:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-24 17:20:33,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-24 17:20:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:33,234 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-24 17:20:33,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 17:20:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-24 17:20:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 17:20:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:33,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:33,236 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-24 17:20:33,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528449356] [2020-09-24 17:20:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,340 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:20:33,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 17:20:33,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:20:33,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,419 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:20:33,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:33,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528449356] [2020-09-24 17:20:33,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:33,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:20:33,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799844993] [2020-09-24 17:20:33,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:20:33,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:20:33,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:20:33,430 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-24 17:20:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:33,479 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-24 17:20:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:20:33,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 17:20:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:33,481 INFO L225 Difference]: With dead ends: 28 [2020-09-24 17:20:33,481 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 17:20:33,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 17:20:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 17:20:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 17:20:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 17:20:33,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-24 17:20:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:33,489 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 17:20:33,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:20:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 17:20:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 17:20:33,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:33,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:33,491 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,492 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-24 17:20:33,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19192874] [2020-09-24 17:20:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,764 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 17:20:33,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-09-24 17:20:33,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:33,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:33,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:20:33,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,993 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:34,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19192874] [2020-09-24 17:20:34,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:20:34,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496417137] [2020-09-24 17:20:34,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:20:34,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:20:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:34,003 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-24 17:20:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,276 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-24 17:20:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:20:34,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 17:20:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,278 INFO L225 Difference]: With dead ends: 34 [2020-09-24 17:20:34,278 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 17:20:34,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 17:20:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-24 17:20:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:20:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-24 17:20:34,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-24 17:20:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,286 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-24 17:20:34,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:20:34,286 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-24 17:20:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 17:20:34,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:34,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:34,288 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-24 17:20:34,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780611795] [2020-09-24 17:20:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,342 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 17:20:34,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 17:20:34,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:20:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:34,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 17:20:34,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 17:20:34,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:34,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:34,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:34,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:34,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780611795] [2020-09-24 17:20:34,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:34,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:20:34,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075422499] [2020-09-24 17:20:34,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:20:34,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:20:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:20:34,384 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-24 17:20:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,417 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-24 17:20:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:20:34,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 17:20:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,420 INFO L225 Difference]: With dead ends: 40 [2020-09-24 17:20:34,420 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:20:34,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:20:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:20:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:20:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:20:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 17:20:34,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-24 17:20:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,433 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 17:20:34,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:20:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 17:20:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 17:20:34,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:34,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:20:34,437 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-24 17:20:34,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642036119] [2020-09-24 17:20:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,735 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 17:20:34,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-24 17:20:34,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:20:34,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:34,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 17:20:34,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,037 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:35,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:35,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642036119] [2020-09-24 17:20:35,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:35,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:20:35,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359344452] [2020-09-24 17:20:35,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:20:35,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:20:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:20:35,047 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 17:20:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,483 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-24 17:20:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:20:35,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 17:20:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,485 INFO L225 Difference]: With dead ends: 41 [2020-09-24 17:20:35,485 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 17:20:35,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:20:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 17:20:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-24 17:20:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:20:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-24 17:20:35,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-24 17:20:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,493 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-24 17:20:35,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:20:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-24 17:20:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 17:20:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:20:35,495 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-24 17:20:35,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257655902] [2020-09-24 17:20:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 17:20:35,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 17:20:35,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 17:20:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,606 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:35,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:35,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257655902] [2020-09-24 17:20:35,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:35,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:20:35,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717835154] [2020-09-24 17:20:35,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:20:35,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:20:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:20:35,613 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-24 17:20:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,659 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-24 17:20:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:20:35,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 17:20:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,661 INFO L225 Difference]: With dead ends: 46 [2020-09-24 17:20:35,661 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 17:20:35,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:20:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 17:20:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-24 17:20:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:20:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 17:20:35,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-24 17:20:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,667 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 17:20:35,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:20:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 17:20:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 17:20:35,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:20:35,669 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-24 17:20:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860244905] [2020-09-24 17:20:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,967 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 17:20:35,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-09-24 17:20:35,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:20:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:20:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,211 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:36,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:36,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:36,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 17:20:36,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860244905] [2020-09-24 17:20:36,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:20:36,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470132460] [2020-09-24 17:20:36,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:20:36,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:20:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:36,221 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 17:20:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,537 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-24 17:20:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:36,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 17:20:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,539 INFO L225 Difference]: With dead ends: 46 [2020-09-24 17:20:36,539 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 17:20:36,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 17:20:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 17:20:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-24 17:20:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 17:20:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-24 17:20:36,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-24 17:20:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,546 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-24 17:20:36,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:20:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-24 17:20:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:20:36,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,547 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:20:36,548 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-24 17:20:36,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727823547] [2020-09-24 17:20:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:20:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,703 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:36,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:36,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:36,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:36,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727823547] [2020-09-24 17:20:36,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:20:36,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675515662] [2020-09-24 17:20:36,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:20:36,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:20:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:20:36,711 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-24 17:20:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,793 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-24 17:20:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:20:36,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 17:20:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,796 INFO L225 Difference]: With dead ends: 56 [2020-09-24 17:20:36,796 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:20:36,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:20:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 17:20:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 17:20:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-24 17:20:36,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-24 17:20:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,809 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-24 17:20:36,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:20:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-24 17:20:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 17:20:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,815 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:20:36,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-24 17:20:36,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214858791] [2020-09-24 17:20:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:20:36,844 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:20:36,844 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:20:36,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:20:36,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:20:36 BoogieIcfgContainer [2020-09-24 17:20:36,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:20:36,889 INFO L168 Benchmark]: Toolchain (without parser) took 5090.36 ms. Allocated memory was 140.5 MB in the beginning and 245.9 MB in the end (delta: 105.4 MB). Free memory was 103.8 MB in the beginning and 153.5 MB in the end (delta: -49.7 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,891 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.98 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,893 INFO L168 Benchmark]: Boogie Preprocessor took 115.93 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 183.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,894 INFO L168 Benchmark]: RCFGBuilder took 306.56 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 170.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,898 INFO L168 Benchmark]: TraceAbstraction took 4333.20 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 169.5 MB in the beginning and 153.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:36,910 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.98 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.93 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 183.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.56 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 170.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4333.20 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 169.5 MB in the beginning and 153.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 48 SDslu, 468 SDs, 0 SdLazy, 421 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 226 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 21754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 23/60 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...