/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:24,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:24,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:24,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:24,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:24,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:24,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:24,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:24,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:24,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:24,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:24,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:24,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:24,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:24,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:24,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:24,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:24,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:24,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:24,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:24,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:24,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:24,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:24,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:24,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:40:24,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:24,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:24,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:24,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:40:24,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:24,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:24,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:24,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:24,672 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:24,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:24,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:24,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:24,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:24,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:24,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:24,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:24,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:24,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:24,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:24,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:24,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:24,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:24,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:24,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:24,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:24,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:24,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:24,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:24,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:24,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:24,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:24,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:24,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:24,677 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 -> NOT_INCREMENTALLY [2020-07-21 11:40:25,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:25,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:25,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:25,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:25,057 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:25,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 11:40:25,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875fb7dd5/ae2912ad50a34874bb52d17f33a20d04/FLAGe399d56b0 [2020-07-21 11:40:25,776 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:25,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 11:40:25,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875fb7dd5/ae2912ad50a34874bb52d17f33a20d04/FLAGe399d56b0 [2020-07-21 11:40:26,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875fb7dd5/ae2912ad50a34874bb52d17f33a20d04 [2020-07-21 11:40:26,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:26,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:26,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:26,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:26,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:26,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b08588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26, skipping insertion in model container [2020-07-21 11:40:26,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:26,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:40:26,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:26,449 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:40:26,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:26,624 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:40:26,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26 WrapperNode [2020-07-21 11:40:26,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:26,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:40:26,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:40:26,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:40:26,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... [2020-07-21 11:40:26,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:40:26,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:40:26,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:40:26,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:40:26,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:40:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:40:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:40:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-21 11:40:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-21 11:40:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:40:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:40:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:40:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-21 11:40:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-21 11:40:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-21 11:40:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-21 11:40:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-21 11:40:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-21 11:40:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-21 11:40:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-21 11:40:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-21 11:40:26,763 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-21 11:40:26,764 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:40:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:40:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:40:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:40:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:40:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:40:27,284 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:40:27,285 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:40:27,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:27 BoogieIcfgContainer [2020-07-21 11:40:27,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:40:27,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:40:27,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:40:27,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:40:27,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:26" (1/3) ... [2020-07-21 11:40:27,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c35fbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:27, skipping insertion in model container [2020-07-21 11:40:27,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:26" (2/3) ... [2020-07-21 11:40:27,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c35fbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:27, skipping insertion in model container [2020-07-21 11:40:27,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:27" (3/3) ... [2020-07-21 11:40:27,312 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 11:40:27,327 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:40:27,341 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:40:27,356 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:40:27,384 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:40:27,385 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:40:27,385 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:40:27,385 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:40:27,385 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:40:27,385 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:40:27,386 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:40:27,386 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:40:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-21 11:40:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:40:27,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:27,424 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, 1, 1, 1, 1] [2020-07-21 11:40:27,425 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-07-21 11:40:27,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:27,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61650730] [2020-07-21 11:40:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:40:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:27,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:27,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61650730] [2020-07-21 11:40:27,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:27,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:40:27,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247994063] [2020-07-21 11:40:27,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:40:27,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:40:27,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:27,694 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-07-21 11:40:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:27,733 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-07-21 11:40:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:40:27,736 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-07-21 11:40:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:27,748 INFO L225 Difference]: With dead ends: 93 [2020-07-21 11:40:27,748 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 11:40:27,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 11:40:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 11:40:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 11:40:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-07-21 11:40:27,808 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-07-21 11:40:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:27,809 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-07-21 11:40:27,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:40:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-07-21 11:40:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:40:27,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:27,811 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:28,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:28,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-07-21 11:40:28,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:28,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898479862] [2020-07-21 11:40:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:28,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:40:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:28,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:28,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898479862] [2020-07-21 11:40:28,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:28,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:40:28,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287629404] [2020-07-21 11:40:28,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:40:28,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:40:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:28,160 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2020-07-21 11:40:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:28,190 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-07-21 11:40:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:40:28,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 11:40:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:28,193 INFO L225 Difference]: With dead ends: 78 [2020-07-21 11:40:28,193 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 11:40:28,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 11:40:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 11:40:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:40:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-21 11:40:28,205 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-07-21 11:40:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:28,206 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-21 11:40:28,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:40:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-21 11:40:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:40:28,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:28,208 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:28,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:28,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-07-21 11:40:28,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:28,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807009586] [2020-07-21 11:40:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:40:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:28,593 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:28,614 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:28,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:28,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807009586] [2020-07-21 11:40:28,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:28,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:40:28,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378669403] [2020-07-21 11:40:28,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:40:28,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:28,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:40:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:40:28,632 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-07-21 11:40:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:28,768 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-07-21 11:40:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:40:28,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-21 11:40:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:28,772 INFO L225 Difference]: With dead ends: 102 [2020-07-21 11:40:28,773 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 11:40:28,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 11:40:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-07-21 11:40:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 11:40:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-07-21 11:40:28,789 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2020-07-21 11:40:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:28,789 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-07-21 11:40:28,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:40:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-07-21 11:40:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:40:28,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:28,791 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:29,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:29,007 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1210151716, now seen corresponding path program 1 times [2020-07-21 11:40:29,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:29,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087783349] [2020-07-21 11:40:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:40:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:29,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:29,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087783349] [2020-07-21 11:40:29,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:29,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:40:29,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574315671] [2020-07-21 11:40:29,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:40:29,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:40:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:40:29,166 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 6 states. [2020-07-21 11:40:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:29,414 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2020-07-21 11:40:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:40:29,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-21 11:40:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:29,417 INFO L225 Difference]: With dead ends: 138 [2020-07-21 11:40:29,417 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 11:40:29,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 11:40:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-07-21 11:40:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 11:40:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-07-21 11:40:29,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-07-21 11:40:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:29,440 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-07-21 11:40:29,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:40:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-07-21 11:40:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:40:29,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:29,445 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:29,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:29,661 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -783992990, now seen corresponding path program 1 times [2020-07-21 11:40:29,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:29,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970535526] [2020-07-21 11:40:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:29,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:40:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:29,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:29,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970535526] [2020-07-21 11:40:29,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:29,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:40:29,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864504835] [2020-07-21 11:40:29,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:40:29,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:29,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:40:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:40:29,781 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2020-07-21 11:40:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:29,913 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-07-21 11:40:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:40:29,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-21 11:40:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:29,915 INFO L225 Difference]: With dead ends: 124 [2020-07-21 11:40:29,916 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 11:40:29,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 11:40:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2020-07-21 11:40:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 11:40:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-07-21 11:40:29,924 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 33 [2020-07-21 11:40:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:29,925 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-07-21 11:40:29,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:40:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-07-21 11:40:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:40:29,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:29,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:30,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:30,135 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash -731835505, now seen corresponding path program 1 times [2020-07-21 11:40:30,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:30,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837474950] [2020-07-21 11:40:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:40:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:30,263 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:40:30,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:30,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837474950] [2020-07-21 11:40:30,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:30,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:40:30,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820504649] [2020-07-21 11:40:30,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:40:30,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:40:30,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:40:30,303 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 6 states. [2020-07-21 11:40:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:30,534 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2020-07-21 11:40:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:40:30,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-21 11:40:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:30,539 INFO L225 Difference]: With dead ends: 146 [2020-07-21 11:40:30,540 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 11:40:30,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 11:40:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 72. [2020-07-21 11:40:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 11:40:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2020-07-21 11:40:30,572 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 38 [2020-07-21 11:40:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:30,573 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2020-07-21 11:40:30,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:40:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2020-07-21 11:40:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:40:30,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:30,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:30,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:30,779 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1568987085, now seen corresponding path program 1 times [2020-07-21 11:40:30,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:30,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403737985] [2020-07-21 11:40:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:40:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:30,881 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:30,907 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:30,909 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:40:30,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:30,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403737985] [2020-07-21 11:40:30,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:30,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:40:30,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094104818] [2020-07-21 11:40:30,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:40:30,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:40:30,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:30,934 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 7 states. [2020-07-21 11:40:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:31,095 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-07-21 11:40:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:40:31,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-21 11:40:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:31,100 INFO L225 Difference]: With dead ends: 104 [2020-07-21 11:40:31,101 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 11:40:31,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:40:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 11:40:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2020-07-21 11:40:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 11:40:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-07-21 11:40:31,122 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 38 [2020-07-21 11:40:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:31,129 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-07-21 11:40:31,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:40:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-07-21 11:40:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 11:40:31,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:31,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:31,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:31,336 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1909797290, now seen corresponding path program 1 times [2020-07-21 11:40:31,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:31,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051014002] [2020-07-21 11:40:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:31,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:40:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:31,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:40:31,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:31,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051014002] [2020-07-21 11:40:31,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:31,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:40:31,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882118919] [2020-07-21 11:40:31,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:40:31,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:40:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:40:31,427 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 4 states. [2020-07-21 11:40:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:31,452 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2020-07-21 11:40:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:40:31,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-21 11:40:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:31,458 INFO L225 Difference]: With dead ends: 135 [2020-07-21 11:40:31,459 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 11:40:31,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:40:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 11:40:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-21 11:40:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 11:40:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-07-21 11:40:31,477 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 40 [2020-07-21 11:40:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:31,478 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-07-21 11:40:31,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:40:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-07-21 11:40:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 11:40:31,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:31,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:31,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:31,697 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-07-21 11:40:31,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:31,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163405619] [2020-07-21 11:40:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:40:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:40:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:31,797 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:31,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:31,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:31,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163405619] [2020-07-21 11:40:31,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:31,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 11:40:31,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306516288] [2020-07-21 11:40:31,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:40:31,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:40:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:31,870 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 7 states. [2020-07-21 11:40:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:32,022 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2020-07-21 11:40:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:40:32,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-21 11:40:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:32,024 INFO L225 Difference]: With dead ends: 215 [2020-07-21 11:40:32,025 INFO L226 Difference]: Without dead ends: 139 [2020-07-21 11:40:32,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 11:40:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-21 11:40:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-07-21 11:40:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 11:40:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-07-21 11:40:32,056 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 40 [2020-07-21 11:40:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:32,057 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-07-21 11:40:32,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:40:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2020-07-21 11:40:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:40:32,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:32,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:32,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:32,260 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-07-21 11:40:32,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:32,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201430121] [2020-07-21 11:40:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:40:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:40:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:32,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201430121] [2020-07-21 11:40:32,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:32,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-07-21 11:40:32,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722104881] [2020-07-21 11:40:32,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:40:32,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:40:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:40:32,518 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 15 states. [2020-07-21 11:40:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:33,443 INFO L93 Difference]: Finished difference Result 431 states and 557 transitions. [2020-07-21 11:40:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 11:40:33,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-07-21 11:40:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:33,446 INFO L225 Difference]: With dead ends: 431 [2020-07-21 11:40:33,446 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 11:40:33,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 11:40:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 11:40:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 162. [2020-07-21 11:40:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 11:40:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2020-07-21 11:40:33,465 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 45 [2020-07-21 11:40:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:33,466 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2020-07-21 11:40:33,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:40:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2020-07-21 11:40:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:40:33,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:33,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:33,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:33,683 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2066975713, now seen corresponding path program 1 times [2020-07-21 11:40:33,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:33,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926175016] [2020-07-21 11:40:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:40:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 11:40:33,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:33,835 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:33,836 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:33,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:33,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926175016] [2020-07-21 11:40:33,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:33,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-21 11:40:33,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580918817] [2020-07-21 11:40:34,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:40:34,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:40:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:40:34,004 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand 15 states. [2020-07-21 11:40:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:34,574 INFO L93 Difference]: Finished difference Result 259 states and 314 transitions. [2020-07-21 11:40:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 11:40:34,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-07-21 11:40:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:34,581 INFO L225 Difference]: With dead ends: 259 [2020-07-21 11:40:34,581 INFO L226 Difference]: Without dead ends: 257 [2020-07-21 11:40:34,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:40:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-21 11:40:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2020-07-21 11:40:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 11:40:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2020-07-21 11:40:34,605 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 45 [2020-07-21 11:40:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:34,608 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2020-07-21 11:40:34,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:40:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2020-07-21 11:40:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:40:34,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:34,612 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:34,826 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-07-21 11:40:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:34,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696694124] [2020-07-21 11:40:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:40:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 11:40:34,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:34,985 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:34,987 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:35,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696694124] [2020-07-21 11:40:35,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:35,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-21 11:40:35,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604679408] [2020-07-21 11:40:35,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:40:35,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:35,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:40:35,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:40:35,141 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand 16 states. [2020-07-21 11:40:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:35,799 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2020-07-21 11:40:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:40:35,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-07-21 11:40:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:35,803 INFO L225 Difference]: With dead ends: 304 [2020-07-21 11:40:35,803 INFO L226 Difference]: Without dead ends: 302 [2020-07-21 11:40:35,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:40:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-21 11:40:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 184. [2020-07-21 11:40:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 11:40:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 229 transitions. [2020-07-21 11:40:35,819 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 229 transitions. Word has length 45 [2020-07-21 11:40:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:35,820 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 229 transitions. [2020-07-21 11:40:35,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:40:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 229 transitions. [2020-07-21 11:40:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:40:35,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:35,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:36,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:36,028 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-07-21 11:40:36,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:36,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077136877] [2020-07-21 11:40:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:40:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:40:36,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:40:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:40:36,106 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:40:36,146 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:40:36,147 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:40:36,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:36,395 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,398 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,399 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,400 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,401 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,401 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,402 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,403 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,403 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,404 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,405 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 11:40:36,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:40:36 BoogieIcfgContainer [2020-07-21 11:40:36,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:40:36,423 INFO L168 Benchmark]: Toolchain (without parser) took 10284.72 ms. Allocated memory was 143.7 MB in the beginning and 285.7 MB in the end (delta: 142.1 MB). Free memory was 100.5 MB in the beginning and 107.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 135.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,424 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.24 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 178.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,425 INFO L168 Benchmark]: Boogie Preprocessor took 55.02 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,426 INFO L168 Benchmark]: RCFGBuilder took 616.75 ms. Allocated memory is still 201.9 MB. Free memory was 175.9 MB in the beginning and 148.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,427 INFO L168 Benchmark]: TraceAbstraction took 9119.48 ms. Allocated memory was 201.9 MB in the beginning and 285.7 MB in the end (delta: 83.9 MB). Free memory was 148.5 MB in the beginning and 107.6 MB in the end (delta: 40.8 MB). Peak memory consumption was 124.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:36,430 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 485.24 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 178.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.02 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 616.75 ms. Allocated memory is still 201.9 MB. Free memory was 175.9 MB in the beginning and 148.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9119.48 ms. Allocated memory was 201.9 MB in the beginning and 285.7 MB in the end (delta: 83.9 MB). Free memory was 148.5 MB in the beginning and 107.6 MB in the end (delta: 40.8 MB). Peak memory consumption was 124.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 VAL [A={3:0}] [L76] CALL parse_expression_list (A) VAL [str={3:0}] [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; VAL [i=-1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}] [L50] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}] [L52] i++ [L53] str[i] [L54] case 0: VAL [i=0, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=14] [L69] EXPR str[i] VAL [i=0, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=14] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=16] [L69] EXPR str[i] VAL [i=1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=16] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[start]=14, str[start]=14] [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] VAL [i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[start]=14] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 VAL [i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=16, str[j]=16] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=16, str[j]=16] [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=16] [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j VAL [i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L61] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={2:0}, src={3:0}] [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={18:19}, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L62] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.9s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 604 SDtfs, 1153 SDslu, 2468 SDs, 0 SdLazy, 1844 SolverSat, 261 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 541 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 432 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 497 NumberOfCodeBlocks, 497 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 611 ConstructedInterpolants, 0 QuantifiedInterpolants, 80915 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1738 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 8 PerfectInterpolantSequences, 6/64 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 incorrect! Received shutdown request...