/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:25:58,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:25:58,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:25:58,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:25:58,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:25:58,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:25:58,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:25:58,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:25:58,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:25:58,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:25:58,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:25:58,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:25:58,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:25:58,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:25:58,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:25:58,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:25:58,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:25:58,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:25:58,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:25:58,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:25:58,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:25:58,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:25:58,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:25:58,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:25:58,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:25:58,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:25:58,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:25:58,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:25:58,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:25:58,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:25:58,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:25:58,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:25:58,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:25:58,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:25:58,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:25:58,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:25:58,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:25:58,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:25:58,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:25:58,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:25:58,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:25:58,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:25:58,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:25:58,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:25:58,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:25:58,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:25:58,991 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:25:58,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:25:58,992 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:25:58,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:25:58,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:25:58,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:25:58,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:25:58,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:25:58,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:25:58,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:25:58,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:25:58,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:25:58,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:25:58,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:25:58,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:25:58,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:25:58,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:25:58,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:25:58,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:25:58,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:25:58,998 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:25:59,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:25:59,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:25:59,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:25:59,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:25:59,321 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:25:59,321 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 20:25:59,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2454f7f42/23b6ced7b11c4bf2b6e814acc3906997/FLAG9484cecf8 [2020-07-21 20:25:59,799 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:25:59,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-21 20:25:59,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2454f7f42/23b6ced7b11c4bf2b6e814acc3906997/FLAG9484cecf8 [2020-07-21 20:26:00,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2454f7f42/23b6ced7b11c4bf2b6e814acc3906997 [2020-07-21 20:26:00,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:26:00,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:26:00,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:26:00,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:26:00,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:26:00,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ea4714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00, skipping insertion in model container [2020-07-21 20:26:00,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:26:00,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:26:00,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:26:00,514 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:26:00,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:26:00,570 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:26:00,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00 WrapperNode [2020-07-21 20:26:00,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:26:00,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:26:00,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:26:00,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:26:00,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... [2020-07-21 20:26:00,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:26:00,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:26:00,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:26:00,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:26:00,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 20:26:00,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:26:00,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:26:00,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:26:00,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:26:00,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:26:00,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:26:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:26:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:26:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:26:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:26:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:26:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:26:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:26:01,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:26:01,060 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:26:01,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:26:01 BoogieIcfgContainer [2020-07-21 20:26:01,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:26:01,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:26:01,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:26:01,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:26:01,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:26:00" (1/3) ... [2020-07-21 20:26:01,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6815bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:26:01, skipping insertion in model container [2020-07-21 20:26:01,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:26:00" (2/3) ... [2020-07-21 20:26:01,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6815bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:26:01, skipping insertion in model container [2020-07-21 20:26:01,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:26:01" (3/3) ... [2020-07-21 20:26:01,076 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-07-21 20:26:01,092 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:26:01,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:26:01,119 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:26:01,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:26:01,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:26:01,147 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:26:01,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:26:01,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:26:01,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:26:01,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:26:01,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:26:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-21 20:26:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:26:01,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:01,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:01,178 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-07-21 20:26:01,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:01,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81626614] [2020-07-21 20:26:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:01,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:01,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:26:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:01,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:26:01,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:01,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81626614] [2020-07-21 20:26:01,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:01,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:26:01,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960516045] [2020-07-21 20:26:01,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:26:01,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:26:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:26:01,394 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-07-21 20:26:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:01,582 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-07-21 20:26:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:26:01,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 20:26:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:01,597 INFO L225 Difference]: With dead ends: 87 [2020-07-21 20:26:01,597 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 20:26:01,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 20:26:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-21 20:26:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 20:26:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-07-21 20:26:01,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-07-21 20:26:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:01,666 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-07-21 20:26:01,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:26:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-07-21 20:26:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:26:01,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:01,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:01,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:01,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:01,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-07-21 20:26:01,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:01,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099799143] [2020-07-21 20:26:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:01,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:01,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:26:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:01,938 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:26:01,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:01,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099799143] [2020-07-21 20:26:01,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:01,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:26:01,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700559554] [2020-07-21 20:26:01,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:26:01,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:26:01,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:26:01,971 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-07-21 20:26:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:02,121 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-07-21 20:26:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:26:02,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 20:26:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:02,128 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:26:02,128 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 20:26:02,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 20:26:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-07-21 20:26:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 20:26:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-07-21 20:26:02,162 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-07-21 20:26:02,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:02,163 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-07-21 20:26:02,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:26:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-07-21 20:26:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:26:02,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:02,165 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:02,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:02,380 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-07-21 20:26:02,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:02,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855970899] [2020-07-21 20:26:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:02,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:02,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:26:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:02,440 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:26:02,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:02,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855970899] [2020-07-21 20:26:02,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:02,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:26:02,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052832946] [2020-07-21 20:26:02,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:26:02,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:26:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:26:02,471 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-07-21 20:26:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:02,591 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 20:26:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:26:02,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 20:26:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:02,593 INFO L225 Difference]: With dead ends: 56 [2020-07-21 20:26:02,594 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 20:26:02,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 20:26:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 20:26:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 20:26:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-07-21 20:26:02,606 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-07-21 20:26:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:02,607 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-07-21 20:26:02,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:26:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-07-21 20:26:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 20:26:02,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:02,609 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:02,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:02,823 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:02,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-07-21 20:26:02,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:02,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712126247] [2020-07-21 20:26:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:02,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:26:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:02,883 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 20:26:02,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:02,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712126247] [2020-07-21 20:26:02,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:02,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:26:02,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16865890] [2020-07-21 20:26:02,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:26:02,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:26:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:02,902 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-07-21 20:26:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:03,042 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-07-21 20:26:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:26:03,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 20:26:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:03,043 INFO L225 Difference]: With dead ends: 60 [2020-07-21 20:26:03,044 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 20:26:03,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:26:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 20:26:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 20:26:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 20:26:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-21 20:26:03,066 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-07-21 20:26:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:03,066 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-21 20:26:03,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:26:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-21 20:26:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:26:03,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:03,069 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:03,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:03,279 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-07-21 20:26:03,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:03,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822539129] [2020-07-21 20:26:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:03,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:03,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:26:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:03,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 20:26:03,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:03,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822539129] [2020-07-21 20:26:03,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:03,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:26:03,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063023939] [2020-07-21 20:26:03,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:26:03,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:26:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:26:03,358 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-07-21 20:26:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:03,463 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-07-21 20:26:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:26:03,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-21 20:26:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:03,465 INFO L225 Difference]: With dead ends: 65 [2020-07-21 20:26:03,465 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 20:26:03,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 20:26:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-07-21 20:26:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 20:26:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-07-21 20:26:03,478 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-07-21 20:26:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:03,478 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-07-21 20:26:03,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:26:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-07-21 20:26:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 20:26:03,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:03,480 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:03,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:03,694 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-07-21 20:26:03,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:03,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84767359] [2020-07-21 20:26:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:03,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:03,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:26:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:03,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 20:26:03,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:03,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84767359] [2020-07-21 20:26:03,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:03,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:26:03,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951653468] [2020-07-21 20:26:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:26:03,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:26:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:26:03,783 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-07-21 20:26:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:03,964 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-07-21 20:26:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:26:03,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-07-21 20:26:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:03,966 INFO L225 Difference]: With dead ends: 74 [2020-07-21 20:26:03,966 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 20:26:03,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:26:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 20:26:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-07-21 20:26:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 20:26:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-07-21 20:26:03,980 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-07-21 20:26:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:03,981 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-07-21 20:26:03,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:26:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-07-21 20:26:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 20:26:03,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:03,984 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:04,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:04,199 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-07-21 20:26:04,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:04,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561981621] [2020-07-21 20:26:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:04,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:26:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:04,301 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 20:26:04,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:04,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561981621] [2020-07-21 20:26:04,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:04,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:26:04,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597602617] [2020-07-21 20:26:04,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:26:04,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:26:04,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:26:04,328 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-07-21 20:26:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:04,525 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 20:26:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:26:04,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 20:26:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:04,527 INFO L225 Difference]: With dead ends: 74 [2020-07-21 20:26:04,527 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 20:26:04,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:26:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 20:26:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 20:26:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 20:26:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-21 20:26:04,538 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-07-21 20:26:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:04,539 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-21 20:26:04,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:26:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-21 20:26:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 20:26:04,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:26:04,542 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:26:04,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:04,751 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:26:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:26:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-07-21 20:26:04,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:26:04,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466627598] [2020-07-21 20:26:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:04,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:26:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:26:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:26:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:26:04,843 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:26:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-21 20:26:04,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:26:04,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466627598] [2020-07-21 20:26:04,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:26:04,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 20:26:04,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221244848] [2020-07-21 20:26:04,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:26:04,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:26:04,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:26:04,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:26:04,871 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-07-21 20:26:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:26:05,074 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-07-21 20:26:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:26:05,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-21 20:26:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:26:05,078 INFO L225 Difference]: With dead ends: 72 [2020-07-21 20:26:05,078 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:26:05,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:26:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:26:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:26:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:26:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:26:05,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-07-21 20:26:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:26:05,083 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:26:05,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:26:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:26:05,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:26:05,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:26:05,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:26:05,851 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:26:05,851 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:26:05,851 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:26:05,851 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:26:05,851 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:26:05,852 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,852 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 20:26:05,853 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-07-21 20:26:05,853 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-07-21 20:26:05,853 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-07-21 20:26:05,853 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,853 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,854 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-21 20:26:05,854 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 20:26:05,854 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,854 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 20:26:05,854 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-07-21 20:26:05,854 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,855 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,855 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,855 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,855 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,855 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,856 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-07-21 20:26:05,856 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,856 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-07-21 20:26:05,856 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-21 20:26:05,856 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-07-21 20:26:05,856 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,856 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-07-21 20:26:05,857 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,857 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,857 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-21 20:26:05,857 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,857 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0)) [2020-07-21 20:26:05,858 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 20:26:05,858 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:26:05,858 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 20:26:05,858 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 20:26:05,858 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:26:05,858 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 20:26:05,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:26:05 BoogieIcfgContainer [2020-07-21 20:26:05,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:26:05,880 INFO L168 Benchmark]: Toolchain (without parser) took 5645.85 ms. Allocated memory was 138.9 MB in the beginning and 245.9 MB in the end (delta: 107.0 MB). Free memory was 103.9 MB in the beginning and 213.4 MB in the end (delta: -109.5 MB). Peak memory consumption was 113.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,882 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.33 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,883 INFO L168 Benchmark]: Boogie Preprocessor took 133.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.5 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,884 INFO L168 Benchmark]: RCFGBuilder took 361.38 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 164.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,885 INFO L168 Benchmark]: TraceAbstraction took 4809.03 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 163.6 MB in the beginning and 213.4 MB in the end (delta: -49.7 MB). Peak memory consumption was 109.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:26:05,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.33 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.5 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.38 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 164.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4809.03 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 163.6 MB in the beginning and 213.4 MB in the end (delta: -49.7 MB). Peak memory consumption was 109.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 24]: Loop Invariant Derived loop invariant: (0 <= i && limit + 4 <= bufsize) && 0 <= j - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((0 <= i && limit + 4 <= bufsize) && 0 <= j) && i < len) && j + 5 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 108 SDslu, 1010 SDs, 0 SdLazy, 525 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 360 HoareAnnotationTreeSize, 55 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 169 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23214 SizeOfPredicates, 19 NumberOfNonLiveVariables, 602 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...