/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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 [2020-09-25 00:04:01,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:04:01,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:04:01,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:04:01,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:04:01,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:04:01,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:04:01,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:04:01,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:04:01,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:04:01,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:04:01,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:04:01,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:04:01,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:04:01,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:04:01,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:04:01,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:04:01,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:04:01,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:04:01,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:04:01,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:04:01,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:04:01,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:04:01,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:04:01,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:04:01,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:04:01,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:04:01,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:04:01,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:04:01,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-25 00:04:01,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:04:01,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:04:01,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:04:01,393 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 [2020-09-25 00:04:01,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:04:01,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:04:01,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:04:01,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:04:01,420 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:04:01,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:04:01,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:04:01,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:04:01,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:04:01,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:04:01,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:04:01,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:04:01,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:04:01,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:04:01,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:04:01,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:04:01,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:01,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:04:01,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:04:01,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:04:01,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:04:01,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:04:01,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:04:01,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:04:01,425 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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-25 00:04:01,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:04:01,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:04:01,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:04:01,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:04:01,924 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:04:01,925 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 00:04:02,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fa1d2030/bb770430c699494999a1b76ca6763d8d/FLAG2e54dad17 [2020-09-25 00:04:02,531 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:02,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 00:04:02,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fa1d2030/bb770430c699494999a1b76ca6763d8d/FLAG2e54dad17 [2020-09-25 00:04:02,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fa1d2030/bb770430c699494999a1b76ca6763d8d [2020-09-25 00:04:02,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:02,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:02,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:02,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:02,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:02,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:02" (1/1) ... [2020-09-25 00:04:02,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:02, skipping insertion in model container [2020-09-25 00:04:02,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:02" (1/1) ... [2020-09-25 00:04:02,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:02,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:03,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:03,124 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:03,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:03,162 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:03,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03 WrapperNode [2020-09-25 00:04:03,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:03,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:03,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:03,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:03,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (1/1) ... [2020-09-25 00:04:03,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:03,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:03,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:03,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:03,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (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 [2020-09-25 00:04:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 00:04:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:03,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:03,562 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:04:03,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:03 BoogieIcfgContainer [2020-09-25 00:04:03,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:03,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:03,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:03,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:03,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:02" (1/3) ... [2020-09-25 00:04:03,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e91441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:03, skipping insertion in model container [2020-09-25 00:04:03,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:03" (2/3) ... [2020-09-25 00:04:03,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e91441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:03, skipping insertion in model container [2020-09-25 00:04:03,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:03" (3/3) ... [2020-09-25 00:04:03,575 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-25 00:04:03,585 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:03,595 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:03,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:03,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:03,647 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:03,648 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:03,648 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:03,648 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:03,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:03,649 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:03,649 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 00:04:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 00:04:03,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:03,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:03,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-25 00:04:03,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:03,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441842019] [2020-09-25 00:04:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:03,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:03,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:03,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 00:04:03,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:03,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-09-25 00:04:03,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:04:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 00:04:03,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:04:04,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:04,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:04,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:04,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:04,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:04,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:04,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:04,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:04,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441842019] [2020-09-25 00:04:04,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:04,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:04:04,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117160922] [2020-09-25 00:04:04,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:04:04,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:04:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:04:04,117 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-25 00:04:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:04,214 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-09-25 00:04:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:04:04,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 00:04:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:04,229 INFO L225 Difference]: With dead ends: 47 [2020-09-25 00:04:04,229 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 00:04:04,234 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 [2020-09-25 00:04:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 00:04:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 00:04:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 00:04:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 00:04:04,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-25 00:04:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:04,285 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 00:04:04,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:04:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 00:04:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 00:04:04,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:04,287 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] [2020-09-25 00:04:04,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:04,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-25 00:04:04,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:04,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314700416] [2020-09-25 00:04:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:04,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 00:04:04,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:04,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-25 00:04:04,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:04:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:04:04,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:04,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:04,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:04,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:04,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:04,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:04,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:04,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314700416] [2020-09-25 00:04:04,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:04,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:04:04,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476445102] [2020-09-25 00:04:05,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:04:05,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:04:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:04:05,003 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-25 00:04:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:05,354 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-25 00:04:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:04:05,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 00:04:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:05,356 INFO L225 Difference]: With dead ends: 34 [2020-09-25 00:04:05,356 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 00:04:05,359 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 [2020-09-25 00:04:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 00:04:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-25 00:04:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 00:04:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 00:04:05,372 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-25 00:04:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:05,372 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 00:04:05,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:04:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 00:04:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 00:04:05,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:05,375 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] [2020-09-25 00:04:05,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:05,375 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-25 00:04:05,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:05,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256254777] [2020-09-25 00:04:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:05,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 00:04:05,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:05,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-25 00:04:05,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 00:04:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 00:04:05,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:05,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:05,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:05,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:05,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:05,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:05,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:05,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256254777] [2020-09-25 00:04:05,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:05,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:04:05,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182034945] [2020-09-25 00:04:05,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:04:05,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:04:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:05,505 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-25 00:04:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:05,533 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-25 00:04:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:04:05,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-25 00:04:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:05,535 INFO L225 Difference]: With dead ends: 40 [2020-09-25 00:04:05,535 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 00:04:05,536 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 [2020-09-25 00:04:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 00:04:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 00:04:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 00:04:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 00:04:05,543 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-25 00:04:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:05,543 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 00:04:05,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:04:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 00:04:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 00:04:05,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:05,545 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] [2020-09-25 00:04:05,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:05,545 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-25 00:04:05,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:05,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244940254] [2020-09-25 00:04:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:05,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 00:04:05,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-25 00:04:05,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 00:04:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:04:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 00:04:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:06,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:06,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:06,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:06,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:06,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:04:06,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:06,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:06,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:06,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244940254] [2020-09-25 00:04:06,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:06,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:04:06,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809207638] [2020-09-25 00:04:06,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:04:06,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:04:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:04:06,058 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 00:04:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:06,482 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-25 00:04:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 00:04:06,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 00:04:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:06,484 INFO L225 Difference]: With dead ends: 41 [2020-09-25 00:04:06,485 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 00:04:06,485 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 [2020-09-25 00:04:06,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 00:04:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-25 00:04:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 00:04:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-25 00:04:06,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-25 00:04:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:06,492 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-25 00:04:06,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:04:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-25 00:04:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 00:04:06,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:06,494 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] [2020-09-25 00:04:06,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:04:06,494 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-25 00:04:06,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:06,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646500183] [2020-09-25 00:04:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:06,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 00:04:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 00:04:06,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 00:04:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:04:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:06,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:06,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:06,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:06,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:06,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:04:06,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:06,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:06,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:06,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:06,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:06,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646500183] [2020-09-25 00:04:06,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:06,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 00:04:06,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126068] [2020-09-25 00:04:06,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:04:06,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:04:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:04:06,606 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-25 00:04:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:06,653 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 00:04:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:04:06,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 00:04:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:06,655 INFO L225 Difference]: With dead ends: 46 [2020-09-25 00:04:06,655 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 00:04:06,656 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 [2020-09-25 00:04:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 00:04:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-25 00:04:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 00:04:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 00:04:06,661 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-25 00:04:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:06,662 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 00:04:06,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:04:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 00:04:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 00:04:06,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:06,663 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] [2020-09-25 00:04:06,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:04:06,664 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-25 00:04:06,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:06,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570614767] [2020-09-25 00:04:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:06,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:06,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 00:04:06,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:06,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-25 00:04:06,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:04:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:04:06,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 00:04:06,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:07,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:07,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 00:04:07,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570614767] [2020-09-25 00:04:07,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:07,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:04:07,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559379384] [2020-09-25 00:04:07,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:04:07,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:04:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:04:07,194 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 00:04:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:07,517 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 00:04:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:04:07,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 00:04:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:07,519 INFO L225 Difference]: With dead ends: 46 [2020-09-25 00:04:07,519 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 00:04:07,520 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 [2020-09-25 00:04:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 00:04:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-25 00:04:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 00:04:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 00:04:07,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-25 00:04:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:07,526 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 00:04:07,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:04:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 00:04:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 00:04:07,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:07,527 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] [2020-09-25 00:04:07,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:04:07,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-25 00:04:07,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:07,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013667813] [2020-09-25 00:04:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:07,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:07,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:07,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 00:04:07,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 00:04:07,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 00:04:07,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:04:07,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:07,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:07,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:07,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:07,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:07,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:07,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:07,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:07,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:07,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:07,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013667813] [2020-09-25 00:04:07,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:07,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:04:07,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643235738] [2020-09-25 00:04:07,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:04:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:04:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:04:07,687 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-25 00:04:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:07,753 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-25 00:04:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:04:07,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 00:04:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:07,755 INFO L225 Difference]: With dead ends: 56 [2020-09-25 00:04:07,755 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 00:04:07,756 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 [2020-09-25 00:04:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 00:04:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 00:04:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 00:04:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 00:04:07,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-25 00:04:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:07,762 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 00:04:07,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:04:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 00:04:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 00:04:07,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:07,763 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] [2020-09-25 00:04:07,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:04:07,764 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-25 00:04:07,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:07,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225049734] [2020-09-25 00:04:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:04:07,776 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:04:07,776 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:04:07,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:04:07,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:04:07 BoogieIcfgContainer [2020-09-25 00:04:07,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:04:07,802 INFO L168 Benchmark]: Toolchain (without parser) took 4932.10 ms. Allocated memory was 139.5 MB in the beginning and 246.9 MB in the end (delta: 107.5 MB). Free memory was 101.5 MB in the beginning and 169.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:07,803 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:04:07,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.93 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:07,805 INFO L168 Benchmark]: Boogie Preprocessor took 117.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 182.9 MB in the end (delta: -91.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:07,806 INFO L168 Benchmark]: RCFGBuilder took 285.42 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:07,807 INFO L168 Benchmark]: TraceAbstraction took 4231.91 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.2 MB in the beginning and 169.2 MB in the end (delta: 7.9 kB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:07,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.93 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 182.9 MB in the end (delta: -91.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.42 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4231.91 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.2 MB in the beginning and 169.2 MB in the end (delta: 7.9 kB). Peak memory consumption was 44.0 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: 8, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 53 SDslu, 487 SDs, 0 SdLazy, 440 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 21585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 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...