/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:23:49,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:23:49,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:23:49,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:23:49,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:23:49,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:23:49,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:23:49,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:23:49,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:23:49,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:23:49,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:23:49,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:23:49,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:23:49,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:23:49,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:23:49,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:23:49,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:23:49,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:23:49,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:23:49,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:23:49,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:23:49,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:23:49,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:23:49,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:23:49,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:23:49,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:23:49,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:23:49,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:23:49,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:23:49,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:23:49,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:23:49,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:23:49,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:23:49,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:23:49,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:23:49,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:23:49,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:23:49,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:23:49,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:23:49,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:23:49,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:23:49,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:23:49,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:23:49,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:23:49,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:23:49,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:23:49,741 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:23:49,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:23:49,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:23:49,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:23:49,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:23:49,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:23:49,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:23:49,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:23:49,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:23:49,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:23:49,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:23:49,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:23:49,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:23:49,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:23:49,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:23:49,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:23:49,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:23:49,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:49,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:23:49,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:23:49,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:23:49,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:23:49,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:23:49,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:23:49,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:23:49,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:23:50,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:23:50,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:23:50,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:23:50,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:23:50,273 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:23:50,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 11:23:50,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/145590d14/ba7b11026efa4f5ab10258e70c395a5e/FLAG4b5dfd7b8 [2020-09-25 11:23:50,918 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:23:50,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 11:23:50,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/145590d14/ba7b11026efa4f5ab10258e70c395a5e/FLAG4b5dfd7b8 [2020-09-25 11:23:51,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/145590d14/ba7b11026efa4f5ab10258e70c395a5e [2020-09-25 11:23:51,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:23:51,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:23:51,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:51,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:23:51,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:23:51,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,303 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 25.09 11:23:51, skipping insertion in model container [2020-09-25 11:23:51,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:23:51,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:23:51,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:51,568 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:23:51,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:51,607 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:23:51,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51 WrapperNode [2020-09-25 11:23:51,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:51,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:23:51,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:23:51,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:23:51,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... [2020-09-25 11:23:51,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:23:51,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:23:51,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:23:51,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:23:51,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:51,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:23:51,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:23:51,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:23:51,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:23:51,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:23:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:23:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:23:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:23:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:23:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:23:52,026 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:23:52,026 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:23:52,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:52 BoogieIcfgContainer [2020-09-25 11:23:52,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:23:52,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:23:52,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:23:52,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:23:52,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:23:51" (1/3) ... [2020-09-25 11:23:52,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aac61c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:52, skipping insertion in model container [2020-09-25 11:23:52,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:51" (2/3) ... [2020-09-25 11:23:52,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aac61c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:52, skipping insertion in model container [2020-09-25 11:23:52,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:52" (3/3) ... [2020-09-25 11:23:52,063 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 11:23:52,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:23:52,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:23:52,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:23:52,196 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:23:52,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:23:52,197 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:23:52,197 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:23:52,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:23:52,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:23:52,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:23:52,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:23:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 11:23:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 11:23:52,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:52,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:52,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 11:23:52,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:52,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960959192] [2020-09-25 11:23:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:52,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:52,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:52,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:23:52,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:23:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-25 11:23:52,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:52,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:23:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:23:52,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:23:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:52,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:52,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:52,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:52,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:52,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:52,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:52,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960959192] [2020-09-25 11:23:52,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:23:52,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:23:52,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447219468] [2020-09-25 11:23:52,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:23:52,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:23:52,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:23:52,690 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 11:23:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:52,813 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-25 11:23:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:23:52,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 11:23:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:52,827 INFO L225 Difference]: With dead ends: 57 [2020-09-25 11:23:52,827 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 11:23:52,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:23:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 11:23:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 11:23:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 11:23:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 11:23:52,878 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 11:23:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:52,878 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 11:23:52,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:23:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 11:23:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 11:23:52,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:52,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:52,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:23:52,881 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 11:23:52,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:52,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807651789] [2020-09-25 11:23:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:52,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 11:23:53,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 11:23:53,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:53,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:23:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:53,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:53,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:53,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:53,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:53,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:53,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807651789] [2020-09-25 11:23:53,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:53,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:23:53,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632789306] [2020-09-25 11:23:53,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:23:53,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:23:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:23:53,583 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 11:23:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:53,847 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 11:23:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:23:53,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 11:23:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:53,852 INFO L225 Difference]: With dead ends: 60 [2020-09-25 11:23:53,852 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 11:23:53,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:23:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 11:23:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 11:23:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:23:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 11:23:53,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 11:23:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:53,864 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 11:23:53,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:23:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 11:23:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 11:23:53,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:53,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:53,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:23:53,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 11:23:53,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:53,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088741182] [2020-09-25 11:23:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:53,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 11:23:54,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-09-25 11:23:54,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:23:54,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:54,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:23:54,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:54,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:54,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:54,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:54,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:54,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:54,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088741182] [2020-09-25 11:23:54,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:54,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:23:54,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889277323] [2020-09-25 11:23:54,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:23:54,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:23:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:23:54,171 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 11:23:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:54,291 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 11:23:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:23:54,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 11:23:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:54,294 INFO L225 Difference]: With dead ends: 60 [2020-09-25 11:23:54,296 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 11:23:54,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 11:23:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 11:23:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 11:23:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 11:23:54,307 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 11:23:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:54,307 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 11:23:54,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:23:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 11:23:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:23:54,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:54,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:54,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:23:54,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 11:23:54,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:54,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770074502] [2020-09-25 11:23:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:23:54,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-09-25 11:23:54,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:23:54,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:54,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:23:54,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:54,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:54,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:54,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:54,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770074502] [2020-09-25 11:23:54,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:54,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:54,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557128552] [2020-09-25 11:23:54,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:54,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:54,995 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 11:23:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,410 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 11:23:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:23:55,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 11:23:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,412 INFO L225 Difference]: With dead ends: 54 [2020-09-25 11:23:55,412 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 11:23:55,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:23:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 11:23:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 11:23:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 11:23:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 11:23:55,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 11:23:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,431 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 11:23:55,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 11:23:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 11:23:55,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:55,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:23:55,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 11:23:55,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180260603] [2020-09-25 11:23:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 11:23:55,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 11:23:55,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:23:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:55,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:23:55,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:55,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:55,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180260603] [2020-09-25 11:23:55,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:55,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:23:55,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008198507] [2020-09-25 11:23:55,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:23:55,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:23:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:23:55,813 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 11:23:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:56,007 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 11:23:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 11:23:56,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 11:23:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:56,008 INFO L225 Difference]: With dead ends: 70 [2020-09-25 11:23:56,008 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 11:23:56,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:23:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 11:23:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 11:23:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 11:23:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 11:23:56,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 11:23:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:56,017 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 11:23:56,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:23:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 11:23:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 11:23:56,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:56,019 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:56,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:23:56,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 11:23:56,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:56,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895404228] [2020-09-25 11:23:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 11:23:56,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 11:23:56,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:23:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:56,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 11:23:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:56,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:56,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:56,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895404228] [2020-09-25 11:23:56,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:23:56,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353573010] [2020-09-25 11:23:56,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:23:56,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:23:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:23:56,587 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 11:23:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:56,894 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 11:23:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 11:23:56,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 11:23:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:56,897 INFO L225 Difference]: With dead ends: 79 [2020-09-25 11:23:56,897 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 11:23:56,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 11:23:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 11:23:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 11:23:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 11:23:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 11:23:56,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 11:23:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:56,905 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 11:23:56,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:23:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 11:23:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:23:56,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:56,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:56,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:23:56,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 11:23:56,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:56,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147359508] [2020-09-25 11:23:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:23:57,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-09-25 11:23:57,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 11:23:57,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:57,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:23:57,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:57,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:57,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:57,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:57,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:57,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:57,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147359508] [2020-09-25 11:23:57,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:57,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 11:23:57,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972278485] [2020-09-25 11:23:57,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 11:23:57,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:57,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 11:23:57,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:23:57,757 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 11:23:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:58,168 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 11:23:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 11:23:58,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 11:23:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:58,169 INFO L225 Difference]: With dead ends: 87 [2020-09-25 11:23:58,170 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 11:23:58,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 11:23:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 11:23:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 11:23:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 11:23:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 11:23:58,184 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 11:23:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:58,187 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 11:23:58,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 11:23:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 11:23:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 11:23:58,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:58,190 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:58,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:23:58,191 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 11:23:58,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:58,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627925378] [2020-09-25 11:23:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:23:58,212 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:23:58,212 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:23:58,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:23:58,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:23:58 BoogieIcfgContainer [2020-09-25 11:23:58,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:23:58,244 INFO L168 Benchmark]: Toolchain (without parser) took 6960.28 ms. Allocated memory was 143.1 MB in the beginning and 274.2 MB in the end (delta: 131.1 MB). Free memory was 106.3 MB in the beginning and 185.1 MB in the end (delta: -78.8 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,245 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.43 ms. Allocated memory is still 143.1 MB. Free memory was 105.7 MB in the beginning and 96.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,246 INFO L168 Benchmark]: Boogie Preprocessor took 116.59 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 96.5 MB in the beginning and 184.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,247 INFO L168 Benchmark]: RCFGBuilder took 310.75 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,248 INFO L168 Benchmark]: TraceAbstraction took 6200.06 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 170.8 MB in the beginning and 185.1 MB in the end (delta: -14.3 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:58,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.43 ms. Allocated memory is still 143.1 MB. Free memory was 105.7 MB in the beginning and 96.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.59 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 96.5 MB in the beginning and 184.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.75 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6200.06 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 170.8 MB in the beginning and 185.1 MB in the end (delta: -14.3 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i