/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/array-fpi/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:46:11,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:46:11,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:46:11,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:46:11,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:46:11,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:46:11,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:46:11,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:46:11,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:46:11,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:46:11,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:46:11,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:46:11,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:46:11,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:46:11,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:46:11,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:46:11,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:46:11,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:46:11,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:46:11,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:46:11,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:46:11,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:46:11,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:46:11,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:46:11,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:46:11,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:46:11,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:46:11,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:46:11,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:46:11,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:46:11,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:46:11,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:46:11,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:46:11,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:46:11,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:46:11,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:46:11,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:46:11,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:46:11,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:46:11,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:46:11,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:46:11,815 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:46:11,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:46:11,816 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:46:11,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:46:11,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:46:11,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:46:11,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:46:11,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:46:11,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:46:11,818 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:46:11,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:46:11,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:46:11,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:46:11,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:46:11,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:46:11,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:46:11,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:46:11,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:46:11,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:46:11,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:46:11,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:46:11,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:46:11,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:11,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:46:11,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:46:11,821 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 [2020-07-20 11:46:12,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:46:12,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:46:12,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:46:12,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:46:12,118 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:46:12,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-20 11:46:12,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a19e68e/a0068c8e9a714839919cd4dbac8af583/FLAGe29a81ce5 [2020-07-20 11:46:12,661 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:46:12,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-20 11:46:12,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a19e68e/a0068c8e9a714839919cd4dbac8af583/FLAGe29a81ce5 [2020-07-20 11:46:13,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a19e68e/a0068c8e9a714839919cd4dbac8af583 [2020-07-20 11:46:13,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:46:13,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:46:13,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:46:13,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:46:13,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:46:13,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c24edc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13, skipping insertion in model container [2020-07-20 11:46:13,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:46:13,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:46:13,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:13,398 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:46:13,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:13,437 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:46:13,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13 WrapperNode [2020-07-20 11:46:13,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:46:13,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:46:13,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:46:13,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:46:13,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... [2020-07-20 11:46:13,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:46:13,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:46:13,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:46:13,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:46:13,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:46:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:46:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:46:13,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:46:13,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:46:13,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:46:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:46:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:46:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:46:13,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:46:13,938 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:46:13,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:13 BoogieIcfgContainer [2020-07-20 11:46:13,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:46:13,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:46:13,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:46:13,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:46:13,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:46:13" (1/3) ... [2020-07-20 11:46:13,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5791e0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:13, skipping insertion in model container [2020-07-20 11:46:13,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:13" (2/3) ... [2020-07-20 11:46:13,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5791e0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:13, skipping insertion in model container [2020-07-20 11:46:13,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:13" (3/3) ... [2020-07-20 11:46:13,951 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-20 11:46:13,962 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:46:13,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:46:13,984 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:46:14,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:46:14,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:46:14,010 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:46:14,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:46:14,010 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:46:14,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:46:14,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:46:14,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:46:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 11:46:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:46:14,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:14,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:14,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 11:46:14,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:14,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459634349] [2020-07-20 11:46:14,049 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 [2020-07-20 11:46:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:46:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:46:14,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:14,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459634349] [2020-07-20 11:46:14,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:14,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:46:14,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018003678] [2020-07-20 11:46:14,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:46:14,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:46:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:46:14,201 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 11:46:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:14,227 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 11:46:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:46:14,228 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 11:46:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:14,237 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:46:14,238 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:46:14,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:46:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:46:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 11:46:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:46:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 11:46:14,283 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 11:46:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:14,284 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 11:46:14,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:46:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 11:46:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:46:14,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:14,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:14,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:14,501 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 11:46:14,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:14,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893492074] [2020-07-20 11:46:14,503 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 [2020-07-20 11:46:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:46:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:46:14,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:14,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893492074] [2020-07-20 11:46:14,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:14,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:46:14,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532861318] [2020-07-20 11:46:14,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:46:14,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:46:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:46:14,633 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 11:46:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:14,721 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 11:46:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:46:14,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 11:46:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:14,725 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:46:14,725 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:46:14,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:46:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:46:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 11:46:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:46:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 11:46:14,739 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 11:46:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:14,740 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 11:46:14,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:46:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 11:46:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:46:14,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:14,741 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] [2020-07-20 11:46:14,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:14,947 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 11:46:14,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:14,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213011392] [2020-07-20 11:46:14,950 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 [2020-07-20 11:46:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:46:15,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:15,047 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 11:46:15,047 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:15,052 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:15,053 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:15,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 11:46:15,101 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:15,101 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 11:46:15,103 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:46:15,116 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-20 11:46:15,117 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:15,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-20 11:46:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:46:15,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:15,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213011392] [2020-07-20 11:46:15,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:15,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:46:15,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392190565] [2020-07-20 11:46:15,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:46:15,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:46:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:46:15,154 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 11:46:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:15,311 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 11:46:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:46:15,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 11:46:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:15,313 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:46:15,313 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 11:46:15,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:46:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 11:46:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-20 11:46:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 11:46:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 11:46:15,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-20 11:46:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:15,324 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 11:46:15,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:46:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 11:46:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:46:15,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:15,326 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] [2020-07-20 11:46:15,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:15,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 11:46:15,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:15,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269170849] [2020-07-20 11:46:15,542 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 [2020-07-20 11:46:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:46:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:46:15,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:15,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269170849] [2020-07-20 11:46:15,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:15,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:46:15,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785611376] [2020-07-20 11:46:15,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:46:15,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:46:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:46:15,601 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-20 11:46:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:15,649 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-20 11:46:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:46:15,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 11:46:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:15,652 INFO L225 Difference]: With dead ends: 74 [2020-07-20 11:46:15,652 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 11:46:15,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:46:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 11:46:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-20 11:46:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:46:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 11:46:15,668 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-20 11:46:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:15,668 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 11:46:15,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:46:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 11:46:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 11:46:15,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:15,672 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:46:15,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:15,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 11:46:15,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:15,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375734580] [2020-07-20 11:46:15,874 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 [2020-07-20 11:46:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:46:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:46:15,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:46:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:46:16,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375734580] [2020-07-20 11:46:16,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:46:16,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 11:46:16,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589719490] [2020-07-20 11:46:16,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:46:16,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:46:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:46:16,064 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-20 11:46:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:16,295 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-20 11:46:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:46:16,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-20 11:46:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:16,297 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:46:16,297 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 11:46:16,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:46:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 11:46:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 11:46:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:46:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 11:46:16,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 11:46:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:16,307 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 11:46:16,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:46:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 11:46:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 11:46:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:16,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:16,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:16,523 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 11:46:16,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:16,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519448810] [2020-07-20 11:46:16,524 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 [2020-07-20 11:46:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:16,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 11:46:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:16,594 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 11:46:16,595 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,599 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:16,600 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-20 11:46:16,613 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 11:46:16,614 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,620 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:16,621 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 11:46:16,658 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-07-20 11:46:16,659 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2020-07-20 11:46:16,660 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,668 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:16,668 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,669 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-20 11:46:16,722 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 11:46:16,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2020-07-20 11:46:16,724 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,736 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:16,737 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,737 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-20 11:46:16,833 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-20 11:46:16,834 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2020-07-20 11:46:16,836 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:16,854 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:16,856 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 11:46:16,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:53 [2020-07-20 11:46:23,306 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-20 11:46:23,307 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 46 [2020-07-20 11:46:23,308 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:23,327 INFO L624 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-07-20 11:46:23,328 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:23,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:7 [2020-07-20 11:46:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:46:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:46:23,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:46:55,008 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 11:47:10,807 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 11:47:22,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519448810] [2020-07-20 11:47:22,064 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-20 11:47:22,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:22,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 11:47:22,064 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 11:47:22,064 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:22,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:22,286 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 11:47:22,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:22 BoogieIcfgContainer [2020-07-20 11:47:22,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:22,288 INFO L168 Benchmark]: Toolchain (without parser) took 69116.74 ms. Allocated memory was 146.8 MB in the beginning and 244.3 MB in the end (delta: 97.5 MB). Free memory was 104.1 MB in the beginning and 119.2 MB in the end (delta: -15.0 MB). Peak memory consumption was 82.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,288 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.81 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,290 INFO L168 Benchmark]: Boogie Preprocessor took 134.59 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 181.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,291 INFO L168 Benchmark]: RCFGBuilder took 368.54 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 164.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,292 INFO L168 Benchmark]: TraceAbstraction took 68342.84 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 163.4 MB in the beginning and 119.2 MB in the end (delta: 44.2 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,295 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.81 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.59 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 181.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.54 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 164.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 68342.84 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 163.4 MB in the beginning and 119.2 MB in the end (delta: 44.2 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND TRUE i