/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:21,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:21,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:21,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:21,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:21,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:21,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:21,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:21,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:21,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:21,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:21,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:21,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:21,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:21,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:21,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:21,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:21,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:21,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:21,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:21,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:21,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:21,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:21,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:21,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:21,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:21,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:21,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:21,687 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 [2020-08-22 16:56:21,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:21,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:21,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:21,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:21,712 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:21,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:21,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:21,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:21,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:21,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:21,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:21,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:21,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:21,713 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:21,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:21,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:21,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:21,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:21,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:21,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:21,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:21,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:21,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:21,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:21,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:21,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:21,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:21,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:21,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:21,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:22,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:22,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:22,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:22,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:22,066 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:22,067 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-08-22 16:56:22,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b11c32eb/74e6242770c84edc96cb819a02e70fa5/FLAG74cdea39d [2020-08-22 16:56:22,580 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:22,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-08-22 16:56:22,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b11c32eb/74e6242770c84edc96cb819a02e70fa5/FLAG74cdea39d [2020-08-22 16:56:23,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b11c32eb/74e6242770c84edc96cb819a02e70fa5 [2020-08-22 16:56:23,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:23,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:23,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:23,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:23,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:23,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68db28d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23, skipping insertion in model container [2020-08-22 16:56:23,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:23,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:23,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:23,263 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:23,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:23,301 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:23,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23 WrapperNode [2020-08-22 16:56:23,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:23,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:23,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:23,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:23,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (1/1) ... [2020-08-22 16:56:23,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:23,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:23,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:23,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:23,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (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 [2020-08-22 16:56:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:23,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:23,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:23,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:23,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:23,826 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 16:56:23,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:23 BoogieIcfgContainer [2020-08-22 16:56:23,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:23,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:23,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:23,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:23,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:23" (1/3) ... [2020-08-22 16:56:23,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585bdf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:23, skipping insertion in model container [2020-08-22 16:56:23,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:23" (2/3) ... [2020-08-22 16:56:23,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585bdf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:23, skipping insertion in model container [2020-08-22 16:56:23,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:23" (3/3) ... [2020-08-22 16:56:23,842 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-08-22 16:56:23,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:23,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:23,889 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:23,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:23,932 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:23,932 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:23,932 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:23,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:23,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:23,933 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:23,933 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-22 16:56:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:56:23,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:23,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:23,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-08-22 16:56:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495814974] [2020-08-22 16:56:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:24,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495814974] [2020-08-22 16:56:24,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:24,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:24,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965981040] [2020-08-22 16:56:24,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:24,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:24,272 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-08-22 16:56:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:24,447 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-08-22 16:56:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:24,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:56:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:24,460 INFO L225 Difference]: With dead ends: 70 [2020-08-22 16:56:24,460 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:56:24,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:56:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-22 16:56:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 16:56:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-08-22 16:56:24,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-08-22 16:56:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:24,515 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-08-22 16:56:24,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-08-22 16:56:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:56:24,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:24,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:24,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:24,518 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-08-22 16:56:24,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:24,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943244841] [2020-08-22 16:56:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:24,557 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:24,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854955597] [2020-08-22 16:56:24,562 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:24,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943244841] [2020-08-22 16:56:24,707 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:24,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854955597] [2020-08-22 16:56:24,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:24,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:24,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123055350] [2020-08-22 16:56:24,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:24,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:24,712 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-08-22 16:56:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:24,823 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-08-22 16:56:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:24,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 16:56:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:24,828 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:56:24,828 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:56:24,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:56:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-08-22 16:56:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 16:56:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-08-22 16:56:24,846 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-08-22 16:56:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:24,846 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-08-22 16:56:24,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-08-22 16:56:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 16:56:24,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:24,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:25,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:25,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-08-22 16:56:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:25,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261383863] [2020-08-22 16:56:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:25,125 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:25,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297748729] [2020-08-22 16:56:25,125 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:56:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261383863] [2020-08-22 16:56:25,250 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297748729] [2020-08-22 16:56:25,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:25,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:25,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334411888] [2020-08-22 16:56:25,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:25,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:25,252 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-08-22 16:56:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:25,313 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-08-22 16:56:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:25,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 16:56:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:25,315 INFO L225 Difference]: With dead ends: 72 [2020-08-22 16:56:25,316 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:56:25,316 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 [2020-08-22 16:56:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:56:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-08-22 16:56:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 16:56:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-08-22 16:56:25,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-08-22 16:56:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:25,327 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-08-22 16:56:25,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-08-22 16:56:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 16:56:25,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:25,328 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] [2020-08-22 16:56:25,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:25,542 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-08-22 16:56:25,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:25,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898018192] [2020-08-22 16:56:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:25,585 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:25,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268516750] [2020-08-22 16:56:25,586 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:25,702 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 [2020-08-22 16:56:25,703 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,706 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:25,707 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-08-22 16:56:25,760 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:25,761 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 [2020-08-22 16:56:25,762 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-08-22 16:56:25,776 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-08-22 16:56:25,777 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-08-22 16:56:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:56:25,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898018192] [2020-08-22 16:56:25,814 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:25,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268516750] [2020-08-22 16:56:25,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:25,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:56:25,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354866109] [2020-08-22 16:56:25,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:25,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:25,818 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 7 states. [2020-08-22 16:56:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:25,934 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-08-22 16:56:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:56:25,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 16:56:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:25,937 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:56:25,937 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 16:56:25,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 16:56:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 16:56:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 16:56:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-08-22 16:56:25,946 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 33 [2020-08-22 16:56:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:25,946 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-08-22 16:56:25,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-08-22 16:56:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 16:56:25,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:25,948 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, 1, 1, 1, 1, 1] [2020-08-22 16:56:26,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1651297135, now seen corresponding path program 1 times [2020-08-22 16:56:26,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:26,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052133710] [2020-08-22 16:56:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:26,200 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:26,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499663177] [2020-08-22 16:56:26,201 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:56:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:56:26,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052133710] [2020-08-22 16:56:26,309 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:26,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499663177] [2020-08-22 16:56:26,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:26,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 16:56:26,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22965588] [2020-08-22 16:56:26,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:26,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:26,311 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-08-22 16:56:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:26,508 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-08-22 16:56:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:56:26,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-22 16:56:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:26,510 INFO L225 Difference]: With dead ends: 113 [2020-08-22 16:56:26,511 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 16:56:26,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 16:56:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-08-22 16:56:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 16:56:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-08-22 16:56:26,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-08-22 16:56:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:26,521 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-08-22 16:56:26,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-08-22 16:56:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:56:26,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:26,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2020-08-22 16:56:26,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2142090186, now seen corresponding path program 1 times [2020-08-22 16:56:26,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:26,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355796248] [2020-08-22 16:56:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:26,765 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:26,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125630488] [2020-08-22 16:56:26,766 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-08-22 16:56:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:26,850 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 14 treesize of output 12 [2020-08-22 16:56:26,852 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:26,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:26,864 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:26,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-08-22 16:56:26,891 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 [2020-08-22 16:56:26,891 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:26,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:26,909 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:26,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-08-22 16:56:27,020 INFO L350 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-08-22 16:56:27,020 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 3 case distinctions, treesize of input 31 treesize of output 59 [2020-08-22 16:56:27,022 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,054 INFO L625 ElimStorePlain]: treesize reduction 23, result has 65.2 percent of original size [2020-08-22 16:56:27,058 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-08-22 16:56:27,084 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:56:27,085 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,095 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:27,095 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-08-22 16:56:27,151 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-08-22 16:56:27,152 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 38 treesize of output 32 [2020-08-22 16:56:27,153 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:27,165 INFO L545 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. [2020-08-22 16:56:27,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:32 [2020-08-22 16:56:27,483 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-08-22 16:56:27,484 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2020-08-22 16:56:27,485 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,501 INFO L625 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-08-22 16:56:27,503 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,503 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-08-22 16:56:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:27,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355796248] [2020-08-22 16:56:27,563 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:27,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125630488] [2020-08-22 16:56:27,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:27,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 16:56:27,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579020253] [2020-08-22 16:56:27,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:56:27,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:27,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:56:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:56:27,565 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 16 states. [2020-08-22 16:56:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:38,626 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-08-22 16:56:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:56:38,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-08-22 16:56:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:38,629 INFO L225 Difference]: With dead ends: 100 [2020-08-22 16:56:38,629 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 16:56:38,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:56:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 16:56:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-08-22 16:56:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:56:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-08-22 16:56:38,652 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 50 [2020-08-22 16:56:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:38,653 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-08-22 16:56:38,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:56:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-08-22 16:56:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 16:56:38,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:38,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2020-08-22 16:56:38,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:56:38,856 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 655680800, now seen corresponding path program 2 times [2020-08-22 16:56:38,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:38,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968389029] [2020-08-22 16:56:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:38,900 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:38,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884181535] [2020-08-22 16:56:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:38,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-22 16:56:39,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968389029] [2020-08-22 16:56:39,029 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:39,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884181535] [2020-08-22 16:56:39,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:39,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:56:39,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793613422] [2020-08-22 16:56:39,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:56:39,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:56:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:39,032 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 9 states. [2020-08-22 16:56:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:39,364 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-08-22 16:56:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:56:39,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 16:56:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:39,371 INFO L225 Difference]: With dead ends: 158 [2020-08-22 16:56:39,371 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 16:56:39,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:56:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 16:56:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-08-22 16:56:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 16:56:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-08-22 16:56:39,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 58 [2020-08-22 16:56:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:39,395 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-08-22 16:56:39,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:56:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-08-22 16:56:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:56:39,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:39,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2020-08-22 16:56:39,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:39,615 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash 404343461, now seen corresponding path program 3 times [2020-08-22 16:56:39,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:39,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362645462] [2020-08-22 16:56:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:39,659 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:39,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858563158] [2020-08-22 16:56:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:56:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-08-22 16:56:39,794 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:39,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:39,876 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:39,876 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:40,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:40,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:40 BoogieIcfgContainer [2020-08-22 16:56:40,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:40,182 INFO L168 Benchmark]: Toolchain (without parser) took 17165.33 ms. Allocated memory was 146.8 MB in the beginning and 244.8 MB in the end (delta: 98.0 MB). Free memory was 103.2 MB in the beginning and 100.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 100.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,183 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.90 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 92.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,184 INFO L168 Benchmark]: Boogie Preprocessor took 152.98 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 179.0 MB in the end (delta: -86.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,185 INFO L168 Benchmark]: RCFGBuilder took 376.09 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 160.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,186 INFO L168 Benchmark]: TraceAbstraction took 16347.21 ms. Allocated memory was 202.4 MB in the beginning and 244.8 MB in the end (delta: 42.5 MB). Free memory was 159.5 MB in the beginning and 100.7 MB in the end (delta: 58.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:40,189 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.90 ms. Allocated memory is still 146.8 MB. Free memory was 102.7 MB in the beginning and 92.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.98 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 179.0 MB in the end (delta: -86.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.09 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 160.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16347.21 ms. Allocated memory was 202.4 MB in the beginning and 244.8 MB in the end (delta: 42.5 MB). Free memory was 159.5 MB in the beginning and 100.7 MB in the end (delta: 58.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=9, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L28] long long *c = malloc(sizeof(long long)*N); [L30] i=0 VAL [\old(N)=0, a={1:0}, b={-2:0}, c={-1:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=3] [L30] COND TRUE i