/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:28:06,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:28:06,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:28:06,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:28:06,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:28:06,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:28:06,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:28:06,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:28:06,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:28:06,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:28:06,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:28:06,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:28:06,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:28:06,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:28:06,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:28:06,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:28:06,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:28:06,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:28:06,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:28:06,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:28:06,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:28:06,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:28:06,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:28:06,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:28:06,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:28:06,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:28:06,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:28:06,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:28:06,504 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 22:28:06,527 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:28:06,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:28:06,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:28:06,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:28:06,532 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:28:06,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:28:06,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:28:06,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:28:06,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:28:06,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:28:06,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:28:06,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:28:06,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:28:06,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:28:06,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:28:06,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:28:06,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:28:06,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:28:06,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:28:06,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:28:06,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:28:06,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:06,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:28:06,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:28:06,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:28:06,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:28:06,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:28:06,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:28:06,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:28:06,848 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:28:06,849 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2020-07-20 22:28:06,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca4c9fe2/b1556d784cdf4326ae35c7b84519bc28/FLAGf3bce44f6 [2020-07-20 22:28:07,360 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:28:07,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2020-07-20 22:28:07,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca4c9fe2/b1556d784cdf4326ae35c7b84519bc28/FLAGf3bce44f6 [2020-07-20 22:28:07,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca4c9fe2/b1556d784cdf4326ae35c7b84519bc28 [2020-07-20 22:28:07,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:28:07,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:28:07,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:28:07,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:28:07,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:28:07,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:07" (1/1) ... [2020-07-20 22:28:07,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208b9fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:07, skipping insertion in model container [2020-07-20 22:28:07,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:07" (1/1) ... [2020-07-20 22:28:07,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:28:07,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:28:08,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:28:08,040 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:28:08,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:28:08,079 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:28:08,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08 WrapperNode [2020-07-20 22:28:08,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:28:08,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:28:08,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:28:08,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:28:08,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (1/1) ... [2020-07-20 22:28:08,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:28:08,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:28:08,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:28:08,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:28:08,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (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 22:28:08,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:28:08,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:28:08,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:28:08,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:28:08,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:28:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:28:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:28:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:28:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:28:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:28:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:28:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:28:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:28:08,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:28:08,528 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 22:28:08,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:08 BoogieIcfgContainer [2020-07-20 22:28:08,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:28:08,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:28:08,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:28:08,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:28:08,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:28:07" (1/3) ... [2020-07-20 22:28:08,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5c8be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:08, skipping insertion in model container [2020-07-20 22:28:08,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:08" (2/3) ... [2020-07-20 22:28:08,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5c8be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:08, skipping insertion in model container [2020-07-20 22:28:08,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:08" (3/3) ... [2020-07-20 22:28:08,541 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2020-07-20 22:28:08,552 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:28:08,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:28:08,586 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:28:08,637 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:28:08,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:28:08,637 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:28:08,638 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:28:08,638 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:28:08,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:28:08,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:28:08,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:28:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-07-20 22:28:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:28:08,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:08,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:08,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1626077920, now seen corresponding path program 1 times [2020-07-20 22:28:08,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:08,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167935104] [2020-07-20 22:28:08,674 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 22:28:08,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:28:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:08,803 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:08,829 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 22:28:08,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:08,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167935104] [2020-07-20 22:28:08,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:08,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:28:08,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963879759] [2020-07-20 22:28:08,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:28:08,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:28:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:28:08,854 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2020-07-20 22:28:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:09,074 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2020-07-20 22:28:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:28:09,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 22:28:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:09,087 INFO L225 Difference]: With dead ends: 111 [2020-07-20 22:28:09,087 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 22:28:09,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 22:28:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-07-20 22:28:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 22:28:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-20 22:28:09,151 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 16 [2020-07-20 22:28:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:09,152 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-20 22:28:09,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:28:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-20 22:28:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:28:09,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:09,154 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:09,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:09,370 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1393145919, now seen corresponding path program 1 times [2020-07-20 22:28:09,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:09,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110734023] [2020-07-20 22:28:09,374 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 22:28:09,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:28:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:09,446 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:28:09,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:09,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110734023] [2020-07-20 22:28:09,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:09,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:09,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487115553] [2020-07-20 22:28:09,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:09,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:09,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:09,470 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 6 states. [2020-07-20 22:28:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:09,667 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-20 22:28:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:28:09,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 22:28:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:09,671 INFO L225 Difference]: With dead ends: 62 [2020-07-20 22:28:09,672 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 22:28:09,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:28:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 22:28:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 22:28:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 22:28:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2020-07-20 22:28:09,688 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 21 [2020-07-20 22:28:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:09,688 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2020-07-20 22:28:09,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2020-07-20 22:28:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 22:28:09,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:09,691 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:09,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:09,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1101915893, now seen corresponding path program 1 times [2020-07-20 22:28:09,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:09,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329976046] [2020-07-20 22:28:09,906 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 22:28:09,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:28:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:28:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 22:28:09,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:09,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329976046] [2020-07-20 22:28:09,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:09,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:28:09,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911422100] [2020-07-20 22:28:09,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:28:09,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:28:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:28:09,971 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 3 states. [2020-07-20 22:28:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:09,998 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2020-07-20 22:28:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:28:09,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-07-20 22:28:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:10,001 INFO L225 Difference]: With dead ends: 89 [2020-07-20 22:28:10,001 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 22:28:10,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 22:28:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 22:28:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 22:28:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 22:28:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-07-20 22:28:10,014 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 50 [2020-07-20 22:28:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:10,015 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-07-20 22:28:10,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:28:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-07-20 22:28:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 22:28:10,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:10,017 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:10,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:10,231 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash 668905142, now seen corresponding path program 1 times [2020-07-20 22:28:10,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:10,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91612611] [2020-07-20 22:28:10,233 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 22:28:10,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:28:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:10,312 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:28:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 22:28:10,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:10,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91612611] [2020-07-20 22:28:10,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:10,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:10,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857089717] [2020-07-20 22:28:10,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:10,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:10,340 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2020-07-20 22:28:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:10,484 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 22:28:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:28:10,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-07-20 22:28:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:10,487 INFO L225 Difference]: With dead ends: 67 [2020-07-20 22:28:10,487 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 22:28:10,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:28:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 22:28:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-07-20 22:28:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 22:28:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2020-07-20 22:28:10,510 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 51 [2020-07-20 22:28:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:10,510 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2020-07-20 22:28:10,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2020-07-20 22:28:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 22:28:10,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:10,520 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:10,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:10,736 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -702087769, now seen corresponding path program 1 times [2020-07-20 22:28:10,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:10,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448608990] [2020-07-20 22:28:10,738 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 22:28:10,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:28:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:10,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 22:28:10,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:10,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448608990] [2020-07-20 22:28:10,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:10,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:10,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90598426] [2020-07-20 22:28:10,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:10,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:10,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:10,848 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 6 states. [2020-07-20 22:28:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:10,932 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-07-20 22:28:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:28:10,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-07-20 22:28:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:10,935 INFO L225 Difference]: With dead ends: 73 [2020-07-20 22:28:10,935 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 22:28:10,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:28:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 22:28:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-07-20 22:28:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 22:28:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-07-20 22:28:10,948 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 86 [2020-07-20 22:28:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:10,949 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-07-20 22:28:10,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-07-20 22:28:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 22:28:10,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:10,952 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:11,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:11,163 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash 58209754, now seen corresponding path program 1 times [2020-07-20 22:28:11,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:11,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676877163] [2020-07-20 22:28:11,166 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 22:28:11,229 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:28:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:11,292 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 22:28:11,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676877163] [2020-07-20 22:28:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:11,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747949653] [2020-07-20 22:28:11,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:11,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:11,340 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 6 states. [2020-07-20 22:28:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:11,430 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-07-20 22:28:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:28:11,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-07-20 22:28:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:11,432 INFO L225 Difference]: With dead ends: 74 [2020-07-20 22:28:11,432 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:28:11,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:28:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:28:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:28:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:28:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:28:11,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2020-07-20 22:28:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:11,435 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:28:11,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:28:11,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:28:11,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:11,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:28:12,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:28:12,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:28:12,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:28:12,090 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:28:12,090 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:28:12,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:28:12,090 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:28:12,090 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:28:12,090 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:28:12,090 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:28:12,091 INFO L264 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,091 INFO L264 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,091 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 72) no Hoare annotation was computed. [2020-07-20 22:28:12,091 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,091 INFO L264 CegarLoopResult]: At program point L52-1(line 52) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,092 INFO L264 CegarLoopResult]: At program point L36-1(lines 35 41) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,092 INFO L264 CegarLoopResult]: At program point L36-2(lines 36 41) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,092 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,094 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,094 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,094 INFO L271 CegarLoopResult]: At program point L70(lines 14 72) the Hoare annotation is: true [2020-07-20 22:28:12,094 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-07-20 22:28:12,095 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,095 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-20 22:28:12,095 INFO L264 CegarLoopResult]: At program point L54-1(lines 53 66) the Hoare annotation is: (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,095 INFO L268 CegarLoopResult]: For program point L46(lines 33 69) no Hoare annotation was computed. [2020-07-20 22:28:12,095 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 72) no Hoare annotation was computed. [2020-07-20 22:28:12,095 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,096 INFO L264 CegarLoopResult]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,096 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 72) the Hoare annotation is: true [2020-07-20 22:28:12,096 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 22:28:12,096 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 22:28:12,096 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,097 INFO L264 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,097 INFO L264 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (< (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,097 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-20 22:28:12,097 INFO L264 CegarLoopResult]: At program point L56-1(line 56) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (< (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 22:28:12,098 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-20 22:28:12,098 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-20 22:28:12,099 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 22:28:12,099 INFO L268 CegarLoopResult]: For program point L24-1(lines 14 72) no Hoare annotation was computed. [2020-07-20 22:28:12,099 INFO L268 CegarLoopResult]: For program point L33(lines 33 69) no Hoare annotation was computed. [2020-07-20 22:28:12,100 INFO L268 CegarLoopResult]: For program point L58(lines 58 64) no Hoare annotation was computed. [2020-07-20 22:28:12,100 INFO L268 CegarLoopResult]: For program point L25(lines 14 72) no Hoare annotation was computed. [2020-07-20 22:28:12,100 INFO L268 CegarLoopResult]: For program point L58-1(lines 58 64) no Hoare annotation was computed. [2020-07-20 22:28:12,100 INFO L268 CegarLoopResult]: For program point L50(lines 50 68) no Hoare annotation was computed. [2020-07-20 22:28:12,100 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,100 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,101 INFO L264 CegarLoopResult]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 22:28:12,101 INFO L268 CegarLoopResult]: For program point L26(lines 14 72) no Hoare annotation was computed. [2020-07-20 22:28:12,101 INFO L268 CegarLoopResult]: For program point L43(lines 33 69) no Hoare annotation was computed. [2020-07-20 22:28:12,101 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:28:12,101 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:28:12,101 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:28:12,101 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:28:12,102 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:28:12,102 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:28:12,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:28:12 BoogieIcfgContainer [2020-07-20 22:28:12,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:28:12,127 INFO L168 Benchmark]: Toolchain (without parser) took 4322.01 ms. Allocated memory was 138.4 MB in the beginning and 246.4 MB in the end (delta: 108.0 MB). Free memory was 103.1 MB in the beginning and 155.2 MB in the end (delta: -52.1 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,129 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.95 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,132 INFO L168 Benchmark]: Boogie Preprocessor took 114.28 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 180.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,141 INFO L168 Benchmark]: RCFGBuilder took 338.74 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 160.9 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,142 INFO L168 Benchmark]: TraceAbstraction took 3589.90 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 160.9 MB in the beginning and 155.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:12,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.95 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.28 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 180.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.74 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 160.9 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3589.90 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 160.9 MB in the beginning and 155.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= scheme && cp + 1 <= urilen) && 1 <= cp - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: ((0 <= c && 0 <= scheme) && cp + 1 <= urilen) && 1 <= cp - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 14, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 390 SDtfs, 90 SDslu, 854 SDs, 0 SdLazy, 312 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 76 PreInvPairs, 102 NumberOfFragments, 375 HoareAnnotationTreeSize, 76 FomulaSimplifications, 218 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 26 FomulaSimplificationsInter, 83 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 315 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 309 ConstructedInterpolants, 0 QuantifiedInterpolants, 30129 SizeOfPredicates, 15 NumberOfNonLiveVariables, 572 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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...