/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:51:57,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:51:57,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:51:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:51:57,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:51:57,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:51:57,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:51:57,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:51:57,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:51:57,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:51:57,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:51:57,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:51:57,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:51:57,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:51:57,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:51:57,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:51:57,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:51:57,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:51:57,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:51:57,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:51:57,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:51:57,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:51:57,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:51:57,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:51:57,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:51:57,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:51:57,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:51:57,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:51:57,581 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 [2020-07-20 17:51:57,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:51:57,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:51:57,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:51:57,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:51:57,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:51:57,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:51:57,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:51:57,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:51:57,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:51:57,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:51:57,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:51:57,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:51:57,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:51:57,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:51:57,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:51:57,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:51:57,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:51:57,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:51:57,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:51:57,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:51:57,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:51:57,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:57,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:51:57,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:51:57,625 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 -> NUM_VARIABLES 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 -> 4 [2020-07-20 17:51:57,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:51:57,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:51:57,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:51:57,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:51:57,926 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:51:57,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 17:51:57,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9aba346f/21cb303f5d174b7caa3f4dd50c7dcdad/FLAG10ede2a49 [2020-07-20 17:51:58,413 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:51:58,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 17:51:58,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9aba346f/21cb303f5d174b7caa3f4dd50c7dcdad/FLAG10ede2a49 [2020-07-20 17:51:58,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9aba346f/21cb303f5d174b7caa3f4dd50c7dcdad [2020-07-20 17:51:58,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:51:58,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:51:58,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:58,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:51:58,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:51:58,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:58" (1/1) ... [2020-07-20 17:51:58,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419ad10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:58, skipping insertion in model container [2020-07-20 17:51:58,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:58" (1/1) ... [2020-07-20 17:51:58,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:51:58,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:51:59,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:59,074 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:51:59,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:59,129 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:51:59,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59 WrapperNode [2020-07-20 17:51:59,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:59,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:51:59,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:51:59,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:51:59,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (1/1) ... [2020-07-20 17:51:59,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:51:59,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:51:59,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:51:59,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:51:59,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (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 [2020-07-20 17:51:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:51:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:51:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:51:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:51:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:51:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:51:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:51:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:51:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:51:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:51:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:51:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:51:59,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:51:59,665 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:51:59,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:59 BoogieIcfgContainer [2020-07-20 17:51:59,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:51:59,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:51:59,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:51:59,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:51:59,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:51:58" (1/3) ... [2020-07-20 17:51:59,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26262116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:59, skipping insertion in model container [2020-07-20 17:51:59,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:59" (2/3) ... [2020-07-20 17:51:59,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26262116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:59, skipping insertion in model container [2020-07-20 17:51:59,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:59" (3/3) ... [2020-07-20 17:51:59,678 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 17:51:59,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:51:59,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-07-20 17:51:59,707 INFO L251 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-07-20 17:51:59,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:51:59,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:51:59,731 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:51:59,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:51:59,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:51:59,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:51:59,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:51:59,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:51:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-20 17:51:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:51:59,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:59,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:59,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1781845407, now seen corresponding path program 1 times [2020-07-20 17:51:59,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:59,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736075374] [2020-07-20 17:51:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:51:59,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:51:59,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:51:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:59,915 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:59,922 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:51:59,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:59,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736075374] [2020-07-20 17:51:59,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:59,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:51:59,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873517023] [2020-07-20 17:51:59,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:51:59,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:51:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:51:59,990 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-20 17:52:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:00,033 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-07-20 17:52:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:52:00,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 17:52:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:00,046 INFO L225 Difference]: With dead ends: 88 [2020-07-20 17:52:00,046 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 17:52:00,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:52:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 17:52:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-07-20 17:52:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 17:52:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-07-20 17:52:00,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 13 [2020-07-20 17:52:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:00,096 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-07-20 17:52:00,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:52:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-07-20 17:52:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:52:00,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:00,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:00,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:00,312 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash -594195383, now seen corresponding path program 1 times [2020-07-20 17:52:00,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:00,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775796300] [2020-07-20 17:52:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:00,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:00,388 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:00,394 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:00,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:00,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775796300] [2020-07-20 17:52:00,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:00,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:00,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205869700] [2020-07-20 17:52:00,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:00,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:00,417 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 4 states. [2020-07-20 17:52:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:00,541 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-07-20 17:52:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:52:00,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:52:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:00,544 INFO L225 Difference]: With dead ends: 153 [2020-07-20 17:52:00,544 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 17:52:00,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 17:52:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2020-07-20 17:52:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 17:52:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-07-20 17:52:00,557 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 14 [2020-07-20 17:52:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:00,557 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-07-20 17:52:00,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-07-20 17:52:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:52:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:00,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:00,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:00,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash -597364152, now seen corresponding path program 1 times [2020-07-20 17:52:00,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:00,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655690322] [2020-07-20 17:52:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:00,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:00,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:00,829 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:00,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:00,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655690322] [2020-07-20 17:52:00,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:00,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:00,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120760414] [2020-07-20 17:52:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:00,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:00,840 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2020-07-20 17:52:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:00,915 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-07-20 17:52:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:52:00,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:52:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:00,917 INFO L225 Difference]: With dead ends: 75 [2020-07-20 17:52:00,917 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 17:52:00,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 17:52:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-07-20 17:52:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 17:52:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-20 17:52:00,926 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 14 [2020-07-20 17:52:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:00,927 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-20 17:52:00,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-20 17:52:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 17:52:00,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:00,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:01,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:01,130 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1240184593, now seen corresponding path program 1 times [2020-07-20 17:52:01,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:01,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716171866] [2020-07-20 17:52:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:01,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:01,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:01,219 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:01,224 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:01,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:01,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716171866] [2020-07-20 17:52:01,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:01,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:01,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871133150] [2020-07-20 17:52:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:01,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:01,235 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-07-20 17:52:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:01,312 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-07-20 17:52:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:52:01,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-20 17:52:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:01,314 INFO L225 Difference]: With dead ends: 96 [2020-07-20 17:52:01,314 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 17:52:01,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 17:52:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-07-20 17:52:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 17:52:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-07-20 17:52:01,322 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 15 [2020-07-20 17:52:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:01,323 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-07-20 17:52:01,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-07-20 17:52:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:52:01,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:01,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:01,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:01,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash 208986383, now seen corresponding path program 1 times [2020-07-20 17:52:01,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:01,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955777945] [2020-07-20 17:52:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:01,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:52:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:01,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:01,598 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:01,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:01,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955777945] [2020-07-20 17:52:01,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:01,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:52:01,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220269267] [2020-07-20 17:52:01,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:52:01,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:52:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:01,610 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2020-07-20 17:52:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:01,697 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-07-20 17:52:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:52:01,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 17:52:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:01,699 INFO L225 Difference]: With dead ends: 95 [2020-07-20 17:52:01,699 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 17:52:01,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:52:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 17:52:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 52. [2020-07-20 17:52:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 17:52:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-20 17:52:01,707 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-07-20 17:52:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:01,707 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-20 17:52:01,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:52:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-20 17:52:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:52:01,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:01,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:01,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:01,919 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1458792136, now seen corresponding path program 1 times [2020-07-20 17:52:01,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:01,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139722545] [2020-07-20 17:52:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:01,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:01,968 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:01,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:01,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139722545] [2020-07-20 17:52:01,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:01,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:01,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947960727] [2020-07-20 17:52:01,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:01,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:01,992 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-07-20 17:52:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:02,061 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-20 17:52:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:52:02,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 17:52:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:02,063 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:52:02,063 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 17:52:02,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 17:52:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 17:52:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 17:52:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-07-20 17:52:02,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2020-07-20 17:52:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:02,077 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-07-20 17:52:02,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-07-20 17:52:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:52:02,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:02,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:02,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:02,279 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2111353611, now seen corresponding path program 1 times [2020-07-20 17:52:02,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:02,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646363737] [2020-07-20 17:52:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:02,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:02,327 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:02,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:02,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646363737] [2020-07-20 17:52:02,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:02,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:02,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700167627] [2020-07-20 17:52:02,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:02,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:02,339 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-07-20 17:52:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:02,399 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-07-20 17:52:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:52:02,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 17:52:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:02,400 INFO L225 Difference]: With dead ends: 91 [2020-07-20 17:52:02,400 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 17:52:02,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 17:52:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 48. [2020-07-20 17:52:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 17:52:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-20 17:52:02,407 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 17 [2020-07-20 17:52:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:02,407 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-20 17:52:02,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:02,408 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-20 17:52:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:52:02,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:02,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:02,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:02,623 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2022080917, now seen corresponding path program 1 times [2020-07-20 17:52:02,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:02,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292346279] [2020-07-20 17:52:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:52:02,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:02,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:52:02,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:02,677 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:02,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:02,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292346279] [2020-07-20 17:52:02,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:02,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:02,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396777083] [2020-07-20 17:52:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:02,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:02,693 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-20 17:52:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:02,760 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 17:52:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:52:02,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 17:52:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:02,762 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:52:02,762 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:52:02,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:52:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-07-20 17:52:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 17:52:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 17:52:02,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 17 [2020-07-20 17:52:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:02,770 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 17:52:02,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 17:52:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:52:02,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:02,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:02,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:02,972 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1740004142, now seen corresponding path program 1 times [2020-07-20 17:52:02,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:02,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576921669] [2020-07-20 17:52:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:03,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:52:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:03,034 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:03,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:03,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576921669] [2020-07-20 17:52:03,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:03,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:52:03,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249357795] [2020-07-20 17:52:03,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:52:03,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:03,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:52:03,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:03,056 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-20 17:52:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:03,150 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 17:52:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:52:03,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 17:52:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:03,151 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:52:03,151 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 17:52:03,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:52:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 17:52:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-07-20 17:52:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:52:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 17:52:03,156 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2020-07-20 17:52:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:03,157 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 17:52:03,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:52:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 17:52:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:52:03,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:03,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:03,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:03,368 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1894443311, now seen corresponding path program 1 times [2020-07-20 17:52:03,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:03,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937027333] [2020-07-20 17:52:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:03,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:52:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:03,416 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:03,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:03,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937027333] [2020-07-20 17:52:03,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:03,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:03,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522630714] [2020-07-20 17:52:03,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:03,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:03,424 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2020-07-20 17:52:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:03,471 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 17:52:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:52:03,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-20 17:52:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:03,473 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:52:03,473 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 17:52:03,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 17:52:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-20 17:52:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 17:52:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-07-20 17:52:03,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 19 [2020-07-20 17:52:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:03,479 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-07-20 17:52:03,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-07-20 17:52:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:52:03,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:03,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:03,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:03,690 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:03,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1401802644, now seen corresponding path program 1 times [2020-07-20 17:52:03,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:03,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690721185] [2020-07-20 17:52:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:03,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:03,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:52:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:03,745 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:03,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:03,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690721185] [2020-07-20 17:52:03,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:03,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:52:03,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204883659] [2020-07-20 17:52:03,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:52:03,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:52:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:52:03,760 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2020-07-20 17:52:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:03,841 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-20 17:52:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:52:03,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 17:52:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:03,842 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:52:03,842 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 17:52:03,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 17:52:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-07-20 17:52:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 17:52:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-20 17:52:03,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 20 [2020-07-20 17:52:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:03,849 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-20 17:52:03,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:52:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-20 17:52:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:52:03,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:03,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:52:04,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,061 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 506212151, now seen corresponding path program 1 times [2020-07-20 17:52:04,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24770038] [2020-07-20 17:52:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:52:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:04,116 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:04,118 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:04,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:04,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24770038] [2020-07-20 17:52:04,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:04,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:52:04,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445318517] [2020-07-20 17:52:04,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:52:04,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:52:04,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:04,125 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-07-20 17:52:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:04,222 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-07-20 17:52:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:52:04,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 17:52:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:04,223 INFO L225 Difference]: With dead ends: 74 [2020-07-20 17:52:04,223 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 17:52:04,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:52:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 17:52:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2020-07-20 17:52:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:52:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-07-20 17:52:04,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2020-07-20 17:52:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:04,231 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-07-20 17:52:04,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:52:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-07-20 17:52:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:52:04,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:04,233 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] [2020-07-20 17:52:04,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,443 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1487289350, now seen corresponding path program 1 times [2020-07-20 17:52:04,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:04,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365796392] [2020-07-20 17:52:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:52:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:04,513 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:04,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:04,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365796392] [2020-07-20 17:52:04,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:04,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:52:04,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577899410] [2020-07-20 17:52:04,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:52:04,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:52:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:52:04,529 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2020-07-20 17:52:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:04,646 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-07-20 17:52:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:52:04,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 17:52:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:04,648 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:52:04,648 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:52:04,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:52:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:52:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-20 17:52:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:52:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 17:52:04,652 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-07-20 17:52:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:04,652 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 17:52:04,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:52:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 17:52:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 17:52:04,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:04,654 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] [2020-07-20 17:52:04,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,864 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:04,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673565, now seen corresponding path program 1 times [2020-07-20 17:52:04,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:04,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88602682] [2020-07-20 17:52:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:04,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:52:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:04,916 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:04,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:04,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88602682] [2020-07-20 17:52:04,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:04,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:52:04,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932104598] [2020-07-20 17:52:04,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:52:04,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:52:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:52:04,926 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-07-20 17:52:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:05,048 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-07-20 17:52:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:52:05,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-07-20 17:52:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:05,049 INFO L225 Difference]: With dead ends: 87 [2020-07-20 17:52:05,050 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 17:52:05,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:52:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 17:52:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2020-07-20 17:52:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 17:52:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 17:52:05,063 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-07-20 17:52:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:05,063 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 17:52:05,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:52:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 17:52:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:52:05,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:05,064 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] [2020-07-20 17:52:05,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:05,276 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash 939145312, now seen corresponding path program 1 times [2020-07-20 17:52:05,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:05,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279230125] [2020-07-20 17:52:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:05,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:05,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:52:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:05,343 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:05,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:05,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279230125] [2020-07-20 17:52:05,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:05,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:52:05,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941331245] [2020-07-20 17:52:05,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:52:05,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:52:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:52:05,355 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-07-20 17:52:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:05,475 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-07-20 17:52:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:52:05,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-20 17:52:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:05,476 INFO L225 Difference]: With dead ends: 60 [2020-07-20 17:52:05,476 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 17:52:05,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:52:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 17:52:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2020-07-20 17:52:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 17:52:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 17:52:05,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2020-07-20 17:52:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:05,482 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 17:52:05,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:52:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 17:52:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:52:05,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:52:05,483 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, 1] [2020-07-20 17:52:05,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:05,695 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:52:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:52:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash -951263229, now seen corresponding path program 1 times [2020-07-20 17:52:05,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:52:05,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186305170] [2020-07-20 17:52:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:05,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:52:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:52:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:52:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:52:05,768 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:52:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:52:05,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:52:05,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186305170] [2020-07-20 17:52:05,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:52:05,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:52:05,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294697] [2020-07-20 17:52:05,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:52:05,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:52:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:52:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:52:05,778 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-07-20 17:52:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:52:05,926 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-07-20 17:52:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:52:05,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-20 17:52:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:52:05,927 INFO L225 Difference]: With dead ends: 125 [2020-07-20 17:52:05,927 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:52:05,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:52:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:52:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:52:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:52:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:52:05,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 17:52:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:52:05,930 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:52:05,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:52:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:52:05,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:52:06,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:52:06,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:52:06,452 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2020-07-20 17:52:06,823 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2020-07-20 17:52:06,940 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2020-07-20 17:52:07,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:52:07,021 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:52:07,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:52:07,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:52:07,022 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:52:07,022 INFO L268 CegarLoopResult]: For program point L225(lines 225 267) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point mainErr3ASSERT_VIOLATIONERROR_FUNCTION(line 86) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 311) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point mainErr11ASSERT_VIOLATIONERROR_FUNCTION(line 203) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point L201(lines 201 271) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point L36(lines 36 292) no Hoare annotation was computed. [2020-07-20 17:52:07,023 INFO L268 CegarLoopResult]: For program point mainErr6ASSERT_VIOLATIONERROR_FUNCTION(line 139) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point L243(line 243) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point mainErr14ASSERT_VIOLATIONERROR_FUNCTION(line 243) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point L227(line 227) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point L161(lines 161 277) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L268 CegarLoopResult]: For program point mainErr5ASSERT_VIOLATIONERROR_FUNCTION(line 110) no Hoare annotation was computed. [2020-07-20 17:52:07,024 INFO L264 CegarLoopResult]: At program point L302(lines 23 310) the Hoare annotation is: (and (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0)) [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 311) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point L203(line 203) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point mainErr13ASSERT_VIOLATIONERROR_FUNCTION(line 227) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point L137(lines 137 281) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point L96(lines 96 123) no Hoare annotation was computed. [2020-07-20 17:52:07,025 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 311) the Hoare annotation is: true [2020-07-20 17:52:07,025 INFO L268 CegarLoopResult]: For program point L253(lines 253 263) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point L55(lines 55 284) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point mainErr8ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point L72(lines 72 127) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L264 CegarLoopResult]: At program point L262(lines 29 304) the Hoare annotation is: (let ((.cse1 (<= (+ main_~main__j~0 4) main_~main__bufsize~0)) (.cse3 (<= (+ main_~main__limit~0 4) main_~main__bufsize~0))) (let ((.cse0 (let ((.cse4 (<= 1 main_~main__i~0))) (or (and .cse3 .cse1 .cse4) (and .cse3 .cse4 (<= 1 main_~__VERIFIER_assert__cond~12))))) (.cse2 (<= 1 main_~main__j~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= 1 main_~__VERIFIER_assert__cond~14) .cse2) (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) .cse3 (<= 0 main_~main__i~0))))) [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point L64(lines 64 283) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point mainErr7ASSERT_VIOLATIONERROR_FUNCTION(line 151) no Hoare annotation was computed. [2020-07-20 17:52:07,026 INFO L268 CegarLoopResult]: For program point L213(lines 213 269) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point mainErr15ASSERT_VIOLATIONERROR_FUNCTION(line 255) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L255(line 255) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L189(lines 189 273) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-20 17:52:07,027 INFO L268 CegarLoopResult]: For program point L173(lines 173 275) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point mainErr10ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 57) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L215(line 215) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L149(lines 149 279) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point mainErr9ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L108(lines 108 121) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L34(lines 34 298) no Hoare annotation was computed. [2020-07-20 17:52:07,028 INFO L268 CegarLoopResult]: For program point L191(line 191) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point mainErr4ASSERT_VIOLATIONERROR_FUNCTION(line 98) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point L84(lines 84 125) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point L18(lines 18 310) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point mainErr12ASSERT_VIOLATIONERROR_FUNCTION(line 215) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point L241(lines 241 265) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point L175(line 175) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L268 CegarLoopResult]: For program point L43(lines 43 286) no Hoare annotation was computed. [2020-07-20 17:52:07,029 INFO L264 CegarLoopResult]: At program point L291(lines 36 292) the Hoare annotation is: (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0) (<= (+ main_~main__j~0 5) main_~main__bufsize~0)) [2020-07-20 17:52:07,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:52:07 BoogieIcfgContainer [2020-07-20 17:52:07,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:52:07,052 INFO L168 Benchmark]: Toolchain (without parser) took 8216.37 ms. Allocated memory was 145.2 MB in the beginning and 271.1 MB in the end (delta: 125.8 MB). Free memory was 103.0 MB in the beginning and 140.3 MB in the end (delta: -37.3 MB). Peak memory consumption was 108.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,053 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.74 ms. Allocated memory is still 145.2 MB. Free memory was 102.6 MB in the beginning and 90.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,054 INFO L168 Benchmark]: Boogie Preprocessor took 119.92 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 90.6 MB in the beginning and 179.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,055 INFO L168 Benchmark]: RCFGBuilder took 419.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 156.7 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,056 INFO L168 Benchmark]: TraceAbstraction took 7378.81 ms. Allocated memory was 201.9 MB in the beginning and 271.1 MB in the end (delta: 69.2 MB). Free memory was 156.0 MB in the beginning and 140.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:52:07,059 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 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.74 ms. Allocated memory is still 145.2 MB. Free memory was 102.6 MB in the beginning and 90.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.92 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 90.6 MB in the beginning and 179.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 156.7 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7378.81 ms. Allocated memory was 201.9 MB in the beginning and 271.1 MB in the end (delta: 69.2 MB). Free memory was 156.0 MB in the beginning and 140.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 255]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 151]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 163]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 227]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 191]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 243]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 215]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 98]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 203]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 139]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 110]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 86]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 57]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && main__j + 4 <= main__bufsize) && 1 <= main__j) || (((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && 1 <= __VERIFIER_assert__cond) && 1 <= main__j)) || (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) && main__j + 5 <= main__bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: main__limit + 4 <= main__bufsize && 0 <= main__i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.4s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 934 SDtfs, 1202 SDslu, 822 SDs, 0 SdLazy, 784 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, 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, 16 MinimizatonAttempts, 424 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 26 NumberOfFragments, 119 HoareAnnotationTreeSize, 7 FomulaSimplifications, 52103879 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12354 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 294 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 278 ConstructedInterpolants, 0 QuantifiedInterpolants, 12794 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1251 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 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...