/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:37:02,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:37:02,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:37:03,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:37:03,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:37:03,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:37:03,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:37:03,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:37:03,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:37:03,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:37:03,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:37:03,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:37:03,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:37:03,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:37:03,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:37:03,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:37:03,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:37:03,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:37:03,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:37:03,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:37:03,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:37:03,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:37:03,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:37:03,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:37:03,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:37:03,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:37:03,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:37:03,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:37:03,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:37:03,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:37:03,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:37:03,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:37:03,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:37:03,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:37:03,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:37:03,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:37:03,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:37:03,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:37:03,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:37:03,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:37:03,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:37:03,087 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 12:37:03,111 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:37:03,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:37:03,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:37:03,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:37:03,113 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:37:03,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:37:03,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:37:03,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:37:03,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:37:03,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:37:03,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:37:03,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:37:03,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:37:03,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:37:03,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:37:03,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:37:03,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:37:03,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:37:03,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:37:03,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:37:03,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:37:03,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:37:03,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:37:03,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:37:03,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:37:03,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:37:03,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:37:03,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:37:03,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:37:03,118 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:37:03,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:37:03,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:37:03,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:37:03,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:37:03,598 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:37:03,599 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-09-21 12:37:03,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3d54ce/68bc665c53f841c7b28e06ed6fba71dc/FLAGf8d4881c0 [2020-09-21 12:37:04,229 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:37:04,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-09-21 12:37:04,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3d54ce/68bc665c53f841c7b28e06ed6fba71dc/FLAGf8d4881c0 [2020-09-21 12:37:04,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3d54ce/68bc665c53f841c7b28e06ed6fba71dc [2020-09-21 12:37:04,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:37:04,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:37:04,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:04,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:37:04,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:37:04,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04, skipping insertion in model container [2020-09-21 12:37:04,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:37:04,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:37:04,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:04,895 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:37:04,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:04,941 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:37:04,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04 WrapperNode [2020-09-21 12:37:04,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:04,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:37:04,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:37:04,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:37:04,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:04,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:05,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:05,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:05,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (1/1) ... [2020-09-21 12:37:05,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:37:05,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:37:05,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:37:05,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:37:05,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (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 12:37:05,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:37:05,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:37:05,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:37:05,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:37:05,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:37:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:37:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:37:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:37:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:37:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:37:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:37:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:37:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:37:05,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:37:05,446 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:37:05,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:05 BoogieIcfgContainer [2020-09-21 12:37:05,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:37:05,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:37:05,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:37:05,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:37:05,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:37:04" (1/3) ... [2020-09-21 12:37:05,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192ccfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:05, skipping insertion in model container [2020-09-21 12:37:05,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:04" (2/3) ... [2020-09-21 12:37:05,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192ccfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:05, skipping insertion in model container [2020-09-21 12:37:05,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:05" (3/3) ... [2020-09-21 12:37:05,461 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-09-21 12:37:05,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:37:05,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:37:05,504 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:37:05,541 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:37:05,541 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:37:05,541 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:37:05,541 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:37:05,542 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:37:05,542 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:37:05,542 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:37:05,542 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:37:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-21 12:37:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:37:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:05,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:05,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-09-21 12:37:05,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:05,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938672073] [2020-09-21 12:37:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:06,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:06,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:37:06,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:06,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-09-21 12:37:06,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:06,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:06,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:06,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:37:06,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:37:06,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:06,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:06,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:06,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:06,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:06,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:06,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:06,725 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 12:37:06,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938672073] [2020-09-21 12:37:06,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:06,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 12:37:06,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661027152] [2020-09-21 12:37:06,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:37:06,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:37:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:37:06,760 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-09-21 12:37:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:13,621 INFO L93 Difference]: Finished difference Result 81 states and 125 transitions. [2020-09-21 12:37:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:37:13,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-09-21 12:37:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:13,646 INFO L225 Difference]: With dead ends: 81 [2020-09-21 12:37:13,646 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:37:13,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:37:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:37:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-09-21 12:37:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:37:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-09-21 12:37:13,725 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 14 [2020-09-21 12:37:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:13,725 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-09-21 12:37:13,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:37:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-09-21 12:37:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:37:13,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:13,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:13,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:37:13,728 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:13,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1109543218, now seen corresponding path program 1 times [2020-09-21 12:37:13,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:13,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556134418] [2020-09-21 12:37:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:13,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:14,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:37:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:37:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-21 12:37:14,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:14,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:14,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:37:14,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:37:14,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:37:14,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:14,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:14,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:14,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:14,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:14,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:14,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:14,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:14,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:14,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:15,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:15,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:15,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:15,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:37:15,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:15,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556134418] [2020-09-21 12:37:15,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:15,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:37:15,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202049981] [2020-09-21 12:37:15,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:15,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:15,025 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 5 states. [2020-09-21 12:37:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:25,634 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-09-21 12:37:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:25,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 12:37:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:25,639 INFO L225 Difference]: With dead ends: 68 [2020-09-21 12:37:25,640 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:37:25,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:25,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:37:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-21 12:37:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:37:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-09-21 12:37:25,657 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 22 [2020-09-21 12:37:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:25,657 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-09-21 12:37:25,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-09-21 12:37:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:37:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:25,660 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:25,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:37:25,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 817844156, now seen corresponding path program 1 times [2020-09-21 12:37:25,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:25,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103878864] [2020-09-21 12:37:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:37:26,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:37:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:37:26,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:26,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:37:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:26,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:26,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:37:26,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:26,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103878864] [2020-09-21 12:37:26,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:26,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:26,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821653874] [2020-09-21 12:37:26,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:26,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:26,818 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-09-21 12:37:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:27,009 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-21 12:37:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:27,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:37:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:27,012 INFO L225 Difference]: With dead ends: 67 [2020-09-21 12:37:27,012 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:37:27,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:37:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-09-21 12:37:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:37:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-09-21 12:37:27,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2020-09-21 12:37:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:27,042 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-09-21 12:37:27,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-09-21 12:37:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:37:27,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:27,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:27,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:37:27,045 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 508253581, now seen corresponding path program 1 times [2020-09-21 12:37:27,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:27,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853802287] [2020-09-21 12:37:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:27,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:29,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:29,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:29,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:37:29,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:29,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2475 [2020-09-21 12:37:29,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:37:29,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:29,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:29,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:29,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:29,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:37:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:29,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:37:29,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:29,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:29,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:29,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:29,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:29,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 12:37:29,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:29,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:29,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853802287] [2020-09-21 12:37:29,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:29,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:29,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524179304] [2020-09-21 12:37:29,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:29,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:29,815 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 5 states. [2020-09-21 12:37:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:30,087 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-09-21 12:37:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:30,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 12:37:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:30,089 INFO L225 Difference]: With dead ends: 67 [2020-09-21 12:37:30,090 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:37:30,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:37:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 12:37:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:37:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-09-21 12:37:30,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 24 [2020-09-21 12:37:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:30,105 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-09-21 12:37:30,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-09-21 12:37:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:37:30,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:30,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:30,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:37:30,107 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash -355973897, now seen corresponding path program 1 times [2020-09-21 12:37:30,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:30,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908837069] [2020-09-21 12:37:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:30,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:30,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:37:31,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:37:31,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-21 12:37:31,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:31,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:37:31,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:37:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:31,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:31,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:31,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:31,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:31,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:31,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:37:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:31,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908837069] [2020-09-21 12:37:31,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:31,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:37:31,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345265636] [2020-09-21 12:37:31,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:31,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:31,464 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2020-09-21 12:37:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:44,207 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2020-09-21 12:37:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:44,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-21 12:37:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:44,209 INFO L225 Difference]: With dead ends: 65 [2020-09-21 12:37:44,210 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:37:44,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:37:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-21 12:37:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:37:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-09-21 12:37:44,220 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 25 [2020-09-21 12:37:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:44,220 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-09-21 12:37:44,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-09-21 12:37:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:37:44,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:44,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:44,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:37:44,222 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1234076184, now seen corresponding path program 1 times [2020-09-21 12:37:44,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:44,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314287468] [2020-09-21 12:37:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:44,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking...