/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:13:01,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:13:01,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:13:01,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:13:01,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:13:01,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:13:01,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:13:01,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:13:01,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:13:01,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:13:01,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:13:01,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:13:01,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:13:01,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:13:01,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:13:01,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:13:01,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:13:01,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:13:01,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:13:01,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:13:01,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:13:01,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:13:01,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:13:01,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:13:01,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:13:01,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:13:01,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:13:01,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:13:01,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:13:01,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:13:01,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:13:01,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:13:01,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:13:01,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:13:01,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:13:01,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:13:01,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:13:01,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:13:01,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:13:01,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:13:01,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:13:01,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:13:02,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:13:02,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:13:02,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:13:02,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:13:02,032 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:13:02,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:13:02,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:13:02,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:13:02,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:13:02,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:13:02,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:13:02,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:13:02,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:13:02,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:13:02,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:13:02,035 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:13:02,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:13:02,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:13:02,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:13:02,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:13:02,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:13:02,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:13:02,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:13:02,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:13:02,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:13:02,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:13:02,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:13:02,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:13:02,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:13:02,042 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:13:02,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:13:02,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:13:02,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:13:02,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:13:02,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:13:02,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-14 05:13:02,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e222c78e/90d3d942cdac43018674e38bede608d7/FLAGdf165319c [2020-10-14 05:13:02,966 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:13:02,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-14 05:13:02,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e222c78e/90d3d942cdac43018674e38bede608d7/FLAGdf165319c [2020-10-14 05:13:03,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e222c78e/90d3d942cdac43018674e38bede608d7 [2020-10-14 05:13:03,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:13:03,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:13:03,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:03,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:13:03,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:13:03,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03, skipping insertion in model container [2020-10-14 05:13:03,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:13:03,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:13:03,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:03,614 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:13:03,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:03,652 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:13:03,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03 WrapperNode [2020-10-14 05:13:03,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:03,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:13:03,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:13:03,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:13:03,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (1/1) ... [2020-10-14 05:13:03,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:13:03,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:13:03,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:13:03,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:13:03,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (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 [2020-10-14 05:13:03,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:13:03,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:13:03,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:13:03,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:13:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:13:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:13:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:13:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:13:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:13:04,088 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:13:04,089 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:13:04,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:04 BoogieIcfgContainer [2020-10-14 05:13:04,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:13:04,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:13:04,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:13:04,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:13:04,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:13:03" (1/3) ... [2020-10-14 05:13:04,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc0442e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:04, skipping insertion in model container [2020-10-14 05:13:04,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:03" (2/3) ... [2020-10-14 05:13:04,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc0442e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:04, skipping insertion in model container [2020-10-14 05:13:04,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:04" (3/3) ... [2020-10-14 05:13:04,103 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-14 05:13:04,116 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:13:04,124 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:13:04,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:13:04,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:13:04,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:13:04,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:13:04,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:13:04,187 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:13:04,187 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:13:04,187 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:13:04,188 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:13:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 05:13:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:13:04,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:04,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:04,228 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-10-14 05:13:04,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:04,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490832724] [2020-10-14 05:13:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:04,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:04,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:13:04,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-14 05:13:04,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:04,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:04,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:13:04,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:04,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:04,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:04,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:04,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:13:04,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:04,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:04,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:04,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490832724] [2020-10-14 05:13:04,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:04,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:04,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165016065] [2020-10-14 05:13:04,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:04,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:04,837 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-14 05:13:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:04,962 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-14 05:13:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:04,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 05:13:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:04,978 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:13:04,978 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:13:04,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:13:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:13:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:13:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 05:13:05,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-10-14 05:13:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:05,029 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 05:13:05,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 05:13:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:05,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:05,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:05,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:13:05,032 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-10-14 05:13:05,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:05,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984491469] [2020-10-14 05:13:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:05,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:05,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 05:13:05,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:13:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:05,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:05,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 05:13:05,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:05,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984491469] [2020-10-14 05:13:05,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:05,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:13:05,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804393063] [2020-10-14 05:13:05,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:13:05,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:13:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:05,288 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-14 05:13:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:05,376 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-14 05:13:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:13:05,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:13:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:05,380 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:13:05,380 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:13:05,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:13:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-14 05:13:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:13:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 05:13:05,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-14 05:13:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:05,401 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 05:13:05,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:13:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 05:13:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:05,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:05,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:05,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:13:05,403 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-10-14 05:13:05,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:05,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52305831] [2020-10-14 05:13:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:05,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:05,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-14 05:13:05,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:05,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:13:05,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:13:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:05,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:05,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:13:05,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:13:05,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52305831] [2020-10-14 05:13:05,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:05,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:13:05,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989664836] [2020-10-14 05:13:05,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:13:05,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:13:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:05,763 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-10-14 05:13:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:05,910 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-14 05:13:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:13:05,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:13:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:05,912 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:13:05,913 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:13:05,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:13:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-14 05:13:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:13:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:13:05,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-10-14 05:13:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:05,924 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:13:05,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:13:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:13:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:13:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:05,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:05,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:13:05,927 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -955555818, now seen corresponding path program 1 times [2020-10-14 05:13:05,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:05,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203005549] [2020-10-14 05:13:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:13:06,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-14 05:13:06,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:13:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:13:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:06,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:06,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:06,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:13:06,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203005549] [2020-10-14 05:13:06,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:06,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:06,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185147475] [2020-10-14 05:13:06,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:06,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:06,200 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-14 05:13:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:06,269 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-14 05:13:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:06,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:13:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:06,271 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:13:06,271 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:13:06,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:13:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-14 05:13:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:13:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 05:13:06,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2020-10-14 05:13:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:06,279 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 05:13:06,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 05:13:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:13:06,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:06,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:06,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:13:06,281 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1169510792, now seen corresponding path program 2 times [2020-10-14 05:13:06,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:06,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585984375] [2020-10-14 05:13:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:13:06,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:13:06,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 05:13:06,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:13:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:13:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:13:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:06,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:06,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:06,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:06,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:06,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:06,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:06,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:13:06,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585984375] [2020-10-14 05:13:06,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:06,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:13:06,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147940718] [2020-10-14 05:13:06,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:06,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:06,766 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-14 05:13:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:06,898 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-14 05:13:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:13:06,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 05:13:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:06,900 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:13:06,900 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:13:06,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:13:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:13:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:13:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 05:13:06,907 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-14 05:13:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:06,907 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 05:13:06,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 05:13:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:13:06,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:06,908 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:06,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:13:06,909 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -228082177, now seen corresponding path program 3 times [2020-10-14 05:13:06,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:06,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128887066] [2020-10-14 05:13:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:07,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:13:07,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:13:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-14 05:13:07,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:07,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:13:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:13:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:13:07,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:07,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:07,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:07,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:07,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:07,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:07,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:07,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:07,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:07,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:13:07,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128887066] [2020-10-14 05:13:07,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:07,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:13:07,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567088979] [2020-10-14 05:13:07,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:07,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:07,413 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-14 05:13:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:07,524 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 05:13:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:13:07,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 05:13:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:07,525 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:13:07,525 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:13:07,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:13:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:13:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:13:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:13:07,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-14 05:13:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:07,528 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:13:07,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:13:07,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:13:07,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:13:07,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:13:07,635 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:13:07,635 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-14 05:13:07,636 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:13:07,636 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:13:07,636 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:13:07,636 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:13:07,636 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:13:07,637 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-10-14 05:13:07,637 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-10-14 05:13:07,637 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-10-14 05:13:07,637 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-10-14 05:13:07,638 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-10-14 05:13:07,638 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1024) [2020-10-14 05:13:07,638 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-10-14 05:13:07,638 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-10-14 05:13:07,639 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-10-14 05:13:07,639 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-10-14 05:13:07,639 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-14 05:13:07,639 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-14 05:13:07,640 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-14 05:13:07,640 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:13:07,640 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-14 05:13:07,640 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:13:07,641 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-14 05:13:07,641 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:13:07,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:13:07 BoogieIcfgContainer [2020-10-14 05:13:07,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:13:07,668 INFO L168 Benchmark]: Toolchain (without parser) took 4302.43 ms. Allocated memory was 143.7 MB in the beginning and 249.0 MB in the end (delta: 105.4 MB). Free memory was 100.1 MB in the beginning and 216.7 MB in the end (delta: -116.6 MB). Peak memory consumption was 116.2 MB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,669 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 143.7 MB. Free memory was 118.2 MB in the beginning and 117.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.61 ms. Allocated memory is still 143.7 MB. Free memory was 99.7 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,671 INFO L168 Benchmark]: Boogie Preprocessor took 125.59 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 89.7 MB in the beginning and 176.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,672 INFO L168 Benchmark]: RCFGBuilder took 315.03 ms. Allocated memory is still 199.8 MB. Free memory was 176.7 MB in the beginning and 162.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,673 INFO L168 Benchmark]: TraceAbstraction took 3569.42 ms. Allocated memory was 199.8 MB in the beginning and 249.0 MB in the end (delta: 49.3 MB). Free memory was 161.9 MB in the beginning and 216.7 MB in the end (delta: -54.7 MB). Peak memory consumption was 122.0 MB. Max. memory is 7.1 GB. [2020-10-14 05:13:07,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 143.7 MB. Free memory was 118.2 MB in the beginning and 117.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.61 ms. Allocated memory is still 143.7 MB. Free memory was 99.7 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.59 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 89.7 MB in the beginning and 176.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.03 ms. Allocated memory is still 199.8 MB. Free memory was 176.7 MB in the beginning and 162.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3569.42 ms. Allocated memory was 199.8 MB in the beginning and 249.0 MB in the end (delta: 49.3 MB). Free memory was 161.9 MB in the beginning and 216.7 MB in the end (delta: -54.7 MB). Peak memory consumption was 122.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 54 SDslu, 123 SDs, 0 SdLazy, 250 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, 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, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 21 NumberOfFragments, 23 HoareAnnotationTreeSize, 13 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 61 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 3920 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 19/22 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 correct! Received shutdown request...