/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 --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 interpolation-heuristic=FIRST --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-eb0fd7c [2020-09-21 11:31:10,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:10,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:10,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:10,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:10,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:10,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:10,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:10,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:10,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:10,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:10,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:10,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:10,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:10,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:10,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:10,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:10,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:10,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:10,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:10,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:10,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:10,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:10,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:10,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:10,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:10,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:10,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:10,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:10,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 11:31:11,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:11,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:11,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:11,005 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 [2020-09-21 11:31:11,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:11,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:11,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:11,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:11,053 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:11,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:11,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:11,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:11,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:11,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:11,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:11,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:11,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:11,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:11,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:11,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:11,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:11,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:11,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:11,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:11,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:11,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:11,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:11,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:11,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:11,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:11,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:11,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:11,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:11,060 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:11,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:11,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:11,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:11,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:11,534 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:11,536 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-21 11:31:11,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/319f51ba7/8e639c7814054959bc8c9399d855e701/FLAGe22e9feef [2020-09-21 11:31:12,185 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:12,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-21 11:31:12,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/319f51ba7/8e639c7814054959bc8c9399d855e701/FLAGe22e9feef [2020-09-21 11:31:12,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/319f51ba7/8e639c7814054959bc8c9399d855e701 [2020-09-21 11:31:12,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:12,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:12,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:12,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:12,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:12,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db04ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12, skipping insertion in model container [2020-09-21 11:31:12,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:12,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:12,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:12,899 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:12,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:12,930 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:12,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12 WrapperNode [2020-09-21 11:31:12,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:12,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:12,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:12,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:12,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:13,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:13,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:13,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:13,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:13,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:13,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:13,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:13,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (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 [2020-09-21 11:31:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:31:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:13,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:13,349 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:31:13,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:13 BoogieIcfgContainer [2020-09-21 11:31:13,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:13,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:13,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:13,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:13,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:12" (1/3) ... [2020-09-21 11:31:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc7fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:13, skipping insertion in model container [2020-09-21 11:31:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (2/3) ... [2020-09-21 11:31:13,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc7fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:13, skipping insertion in model container [2020-09-21 11:31:13,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:13" (3/3) ... [2020-09-21 11:31:13,371 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-21 11:31:13,384 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:13,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:13,425 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:13,466 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:13,466 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:13,466 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:13,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:13,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:13,467 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:13,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:13,467 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 11:31:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:31:13,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,505 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-09-21 11:31:13,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963663960] [2020-09-21 11:31:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,644 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,645 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:31:13,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:13,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,684 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,684 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,685 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,685 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:13,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:13,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963663960] [2020-09-21 11:31:13,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:13,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:31:13,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649159710] [2020-09-21 11:31:13,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:31:13,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:31:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:13,728 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 11:31:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,759 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 11:31:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:31:13,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:31:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,772 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:31:13,773 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 11:31:13,777 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 [2020-09-21 11:31:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 11:31:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 11:31:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 11:31:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 11:31:13,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 11:31:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,823 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 11:31:13,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:31:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 11:31:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:31:13,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:13,824 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-09-21 11:31:13,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720774250] [2020-09-21 11:31:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,908 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,909 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,909 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,910 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:31:13,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 11:31:13,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:31:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,985 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,986 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:13,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:13,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720774250] [2020-09-21 11:31:13,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:13,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:31:13,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426064760] [2020-09-21 11:31:13,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:13,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:13,997 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 11:31:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,056 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-09-21 11:31:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:14,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 11:31:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,058 INFO L225 Difference]: With dead ends: 19 [2020-09-21 11:31:14,058 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 11:31:14,059 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 [2020-09-21 11:31:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 11:31:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 11:31:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 11:31:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-09-21 11:31:14,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-09-21 11:31:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,066 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-09-21 11:31:14,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-09-21 11:31:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:31:14,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:14,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2020-09-21 11:31:14,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390455610] [2020-09-21 11:31:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,148 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,150 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,154 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:31:14,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 11:31:14,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:31:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:14,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,494 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,494 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:14,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390455610] [2020-09-21 11:31:14,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:14,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711487554] [2020-09-21 11:31:14,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:14,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:14,513 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-09-21 11:31:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,636 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-09-21 11:31:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:14,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-21 11:31:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,638 INFO L225 Difference]: With dead ends: 22 [2020-09-21 11:31:14,639 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:31:14,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:31:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:31:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:31:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-09-21 11:31:14,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-09-21 11:31:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,651 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-09-21 11:31:14,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-09-21 11:31:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:31:14,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:14,656 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-09-21 11:31:14,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241152367] [2020-09-21 11:31:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,700 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,702 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,702 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,703 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:31:14,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:31:14,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:31:14,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:14,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,722 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,722 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,723 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,723 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241152367] [2020-09-21 11:31:14,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:14,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:14,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145634230] [2020-09-21 11:31:14,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:14,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:14,747 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-09-21 11:31:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,780 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-09-21 11:31:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:14,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-21 11:31:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,783 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:31:14,783 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:31:14,785 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 [2020-09-21 11:31:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:31:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:31:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:31:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-09-21 11:31:14,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-09-21 11:31:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,795 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-09-21 11:31:14,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-09-21 11:31:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:31:14,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:14,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,799 INFO L82 PathProgramCache]: Analyzing trace with hash -335184905, now seen corresponding path program 2 times [2020-09-21 11:31:14,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669009581] [2020-09-21 11:31:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,872 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,873 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,873 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:31:14,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 11:31:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:31:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,091 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,093 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,093 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,094 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:15,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:31:15,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669009581] [2020-09-21 11:31:15,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:15,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:15,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566388923] [2020-09-21 11:31:15,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:15,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:15,104 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-09-21 11:31:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,305 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-09-21 11:31:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:15,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-21 11:31:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,307 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:31:15,307 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:31:15,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:31:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-09-21 11:31:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:31:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:31:15,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-09-21 11:31:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,320 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:31:15,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:31:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:31:15,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:15,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-09-21 11:31:15,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100271110] [2020-09-21 11:31:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,376 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,376 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,376 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,377 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:31:15,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:31:15,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:15,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,398 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,398 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,398 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,398 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:15,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:15,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:15,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100271110] [2020-09-21 11:31:15,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:15,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 11:31:15,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954256272] [2020-09-21 11:31:15,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:15,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:15,405 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-09-21 11:31:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,429 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 11:31:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:15,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 11:31:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,430 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:31:15,430 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:31:15,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:31:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 11:31:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:31:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 11:31:15,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-09-21 11:31:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,437 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 11:31:15,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 11:31:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:31:15,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:15,439 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1404719277, now seen corresponding path program 2 times [2020-09-21 11:31:15,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572392972] [2020-09-21 11:31:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,462 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:31:15,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:15,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:31:15,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,489 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,490 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,490 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,490 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:15,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:15,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:15,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:15,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572392972] [2020-09-21 11:31:15,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:15,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:15,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83741232] [2020-09-21 11:31:15,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:15,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:15,496 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-09-21 11:31:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,544 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 11:31:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:15,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 11:31:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,546 INFO L225 Difference]: With dead ends: 33 [2020-09-21 11:31:15,546 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:31:15,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:31:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 11:31:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:31:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 11:31:15,553 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-09-21 11:31:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,554 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 11:31:15,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 11:31:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:31:15,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:15,555 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 3 times [2020-09-21 11:31:15,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945096465] [2020-09-21 11:31:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:31:15,571 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:31:15,571 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:31:15,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:15,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:15 BoogieIcfgContainer [2020-09-21 11:31:15,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:15,598 INFO L168 Benchmark]: Toolchain (without parser) took 2977.32 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 103.0 MB in the beginning and 132.8 MB in the end (delta: -29.8 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,599 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:31:15,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.31 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,601 INFO L168 Benchmark]: Boogie Preprocessor took 110.73 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,602 INFO L168 Benchmark]: RCFGBuilder took 311.85 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,603 INFO L168 Benchmark]: TraceAbstraction took 2238.81 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 169.0 MB in the beginning and 132.8 MB in the end (delta: 36.1 MB). Peak memory consumption was 69.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,607 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.31 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.73 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.85 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2238.81 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 169.0 MB in the beginning and 132.8 MB in the end (delta: 36.1 MB). Peak memory consumption was 69.7 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 12 SDslu, 157 SDs, 0 SdLazy, 144 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 4644 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...