/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/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:56,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:56,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:56,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:56,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:56,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:56,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:56,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:56,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:56,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:56,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:56,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:56,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:56,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:56,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:56,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:56,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:56,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:56,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:56,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:56,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:56,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:56,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:56,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:56,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:56,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:56,057 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 [2020-07-07 11:31:56,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:56,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:56,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:56,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:56,075 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:56,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:56,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:56,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:56,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:56,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:56,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:56,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:56,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:56,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:56,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:56,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:56,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:56,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:56,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:56,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:56,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:56,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:56,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:56,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:56,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:56,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:56,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:56,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:56,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:56,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:56,463 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:56,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:56,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:56,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:56,483 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:56,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-07 11:31:56,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138b35654/79964e5725e547ec99bcf6d193886ca3/FLAG8fb9bd322 [2020-07-07 11:31:57,103 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:57,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-07 11:31:57,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138b35654/79964e5725e547ec99bcf6d193886ca3/FLAG8fb9bd322 [2020-07-07 11:31:57,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138b35654/79964e5725e547ec99bcf6d193886ca3 [2020-07-07 11:31:57,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:57,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:57,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:57,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:57,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:57,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3d71eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57, skipping insertion in model container [2020-07-07 11:31:57,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:57,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:57,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:57,791 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:57,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:57,829 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:57,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57 WrapperNode [2020-07-07 11:31:57,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:57,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:57,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:57,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:57,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (1/1) ... [2020-07-07 11:31:57,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:57,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:57,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:57,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:57,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (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 [2020-07-07 11:31:58,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:58,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:58,033 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:31:58,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:31:58,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:58,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:58,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:31:58,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:31:58,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:58,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:58,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:58,366 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:31:58,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:58 BoogieIcfgContainer [2020-07-07 11:31:58,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:58,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:58,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:58,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:58,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:57" (1/3) ... [2020-07-07 11:31:58,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c26366d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:58, skipping insertion in model container [2020-07-07 11:31:58,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:57" (2/3) ... [2020-07-07 11:31:58,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c26366d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:58, skipping insertion in model container [2020-07-07 11:31:58,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:58" (3/3) ... [2020-07-07 11:31:58,379 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-07 11:31:58,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:58,398 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:58,415 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:58,443 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:58,443 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:58,443 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:58,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:58,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:58,444 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:58,444 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:58,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-07 11:31:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:58,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:58,476 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] [2020-07-07 11:31:58,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-07 11:31:58,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:58,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325520114] [2020-07-07 11:31:58,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:58,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325520114] [2020-07-07 11:31:58,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:58,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:31:58,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498108667] [2020-07-07 11:31:58,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:58,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:58,770 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-07 11:31:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:58,906 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-07 11:31:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:58,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:31:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:58,918 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:31:58,918 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 11:31:58,923 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 [2020-07-07 11:31:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 11:31:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-07 11:31:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 11:31:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-07 11:31:58,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-07 11:31:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:58,971 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-07 11:31:58,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-07 11:31:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:31:58,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:58,973 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] [2020-07-07 11:31:58,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:31:58,974 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:58,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-07 11:31:58,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:58,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272562999] [2020-07-07 11:31:58,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:59,013 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:59,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076045315] [2020-07-07 11:31:59,014 INFO L94 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 [2020-07-07 11:31:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:59,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:31:59,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:31:59,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272562999] [2020-07-07 11:31:59,197 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:59,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076045315] [2020-07-07 11:31:59,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:59,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:31:59,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340728767] [2020-07-07 11:31:59,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:31:59,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:59,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:31:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:31:59,203 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-07 11:31:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:59,306 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-07 11:31:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:31:59,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-07 11:31:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:59,310 INFO L225 Difference]: With dead ends: 56 [2020-07-07 11:31:59,310 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:31:59,311 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 [2020-07-07 11:31:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:31:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-07 11:31:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:31:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-07 11:31:59,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-07 11:31:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:59,327 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-07 11:31:59,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:31:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-07 11:31:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:31:59,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:59,329 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] [2020-07-07 11:31:59,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:31:59,544 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-07 11:31:59,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:59,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118007114] [2020-07-07 11:31:59,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:59,580 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:59,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745295435] [2020-07-07 11:31:59,581 INFO L94 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 [2020-07-07 11:31:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:59,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:59,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:59,743 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 [2020-07-07 11:31:59,744 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:31:59,749 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:59,749 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:59,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-07 11:31:59,791 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:31:59,792 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 [2020-07-07 11:31:59,794 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-07 11:31:59,808 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-07 11:31:59,809 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:31:59,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-07 11:31:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:31:59,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118007114] [2020-07-07 11:31:59,844 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:59,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745295435] [2020-07-07 11:31:59,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:59,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:31:59,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274725385] [2020-07-07 11:31:59,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:31:59,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:31:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:59,863 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-07 11:32:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:00,003 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-07 11:32:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:32:00,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-07 11:32:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:00,005 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:32:00,005 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:32:00,006 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 [2020-07-07 11:32:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:32:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-07 11:32:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 11:32:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-07 11:32:00,019 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-07 11:32:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:00,019 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-07 11:32:00,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-07 11:32:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:00,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:00,020 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] [2020-07-07 11:32:00,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:00,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:00,224 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-07 11:32:00,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:00,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185831785] [2020-07-07 11:32:00,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:32:00,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185831785] [2020-07-07 11:32:00,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:00,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:32:00,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039712404] [2020-07-07 11:32:00,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:32:00,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:32:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:00,347 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-07 11:32:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:00,451 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-07 11:32:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:32:00,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-07 11:32:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:00,453 INFO L225 Difference]: With dead ends: 74 [2020-07-07 11:32:00,453 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:32:00,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:32:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-07 11:32:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:32:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-07 11:32:00,463 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-07 11:32:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:00,464 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-07 11:32:00,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:32:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-07 11:32:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 11:32:00,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:00,466 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] [2020-07-07 11:32:00,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:32:00,466 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-07 11:32:00,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:00,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384285926] [2020-07-07 11:32:00,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:00,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:00,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719957357] [2020-07-07 11:32:00,486 INFO L94 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 [2020-07-07 11:32:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:00,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:00,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:32:00,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384285926] [2020-07-07 11:32:00,597 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:00,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719957357] [2020-07-07 11:32:00,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:00,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-07 11:32:00,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783981203] [2020-07-07 11:32:00,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:32:00,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:32:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:00,600 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-07-07 11:32:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:00,751 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-07 11:32:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:32:00,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-07 11:32:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:00,753 INFO L225 Difference]: With dead ends: 91 [2020-07-07 11:32:00,753 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 11:32:00,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:32:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 11:32:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-07 11:32:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:32:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-07 11:32:00,763 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-07 11:32:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:00,764 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-07 11:32:00,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-07 11:32:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 11:32:00,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:00,766 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] [2020-07-07 11:32:00,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:00,981 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-07 11:32:00,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:00,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239899590] [2020-07-07 11:32:00,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:01,005 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:01,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639864942] [2020-07-07 11:32:01,006 INFO L94 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 [2020-07-07 11:32:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:01,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-07 11:32:01,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:01,109 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 [2020-07-07 11:32:01,110 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,115 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:01,116 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,116 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-07 11:32:01,129 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 [2020-07-07 11:32:01,129 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,136 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:01,137 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-07 11:32:01,174 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-07-07 11:32:01,175 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 [2020-07-07 11:32:01,176 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,184 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:01,184 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-07 11:32:01,239 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-07 11:32:01,240 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 [2020-07-07 11:32:01,242 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:01,257 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-07 11:32:01,333 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-07 11:32:01,334 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 [2020-07-07 11:32:01,336 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:01,350 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:01,352 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. [2020-07-07 11:32:01,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:53 [2020-07-07 11:32:05,815 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-07 11:32:05,815 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 [2020-07-07 11:32:05,817 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:05,836 INFO L624 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-07-07 11:32:05,837 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:05,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:7 [2020-07-07 11:32:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:05,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239899590] [2020-07-07 11:32:05,950 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:05,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639864942] [2020-07-07 11:32:05,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:05,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-07 11:32:05,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619121995] [2020-07-07 11:32:05,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:32:05,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:32:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2020-07-07 11:32:05,953 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 16 states. [2020-07-07 11:32:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:21,663 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-07-07 11:32:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:32:21,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-07-07 11:32:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:21,672 INFO L225 Difference]: With dead ends: 95 [2020-07-07 11:32:21,672 INFO L226 Difference]: Without dead ends: 65 [2020-07-07 11:32:21,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=97, Invalid=408, Unknown=1, NotChecked=0, Total=506 [2020-07-07 11:32:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-07 11:32:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-07-07 11:32:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:32:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-07-07 11:32:21,687 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2020-07-07 11:32:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:21,688 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-07-07 11:32:21,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:32:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-07-07 11:32:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 11:32:21,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:21,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-07-07 11:32:21,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:21,914 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1235795269, now seen corresponding path program 2 times [2020-07-07 11:32:21,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:21,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763837825] [2020-07-07 11:32:21,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:21,944 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:21,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113571034] [2020-07-07 11:32:21,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 11:32:22,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:22,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:22,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:32:22,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 11:32:22,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763837825] [2020-07-07 11:32:22,108 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:32:22,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113571034] [2020-07-07 11:32:22,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:22,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:32:22,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521212399] [2020-07-07 11:32:22,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:32:22,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:22,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:32:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:32:22,110 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2020-07-07 11:32:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:22,498 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-07-07 11:32:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:32:22,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-07-07 11:32:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:22,503 INFO L225 Difference]: With dead ends: 127 [2020-07-07 11:32:22,503 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:32:22,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:32:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:32:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-07-07 11:32:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-07 11:32:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-07-07 11:32:22,529 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-07-07 11:32:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:22,530 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-07-07 11:32:22,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:32:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-07-07 11:32:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 11:32:22,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:22,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-07-07 11:32:22,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:32:22,735 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1577312680, now seen corresponding path program 3 times [2020-07-07 11:32:22,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:22,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111948820] [2020-07-07 11:32:22,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:22,758 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:32:22,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15912794] [2020-07-07 11:32:22,759 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:32:23,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:32:23,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-07 11:32:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:23,818 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:32:23,819 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:32:24,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:24,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:32:24 BoogieIcfgContainer [2020-07-07 11:32:24,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:32:24,093 INFO L168 Benchmark]: Toolchain (without parser) took 26564.93 ms. Allocated memory was 136.3 MB in the beginning and 254.8 MB in the end (delta: 118.5 MB). Free memory was 101.3 MB in the beginning and 184.2 MB in the end (delta: -82.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,094 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.11 ms. Allocated memory is still 136.3 MB. Free memory was 101.1 MB in the beginning and 90.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,096 INFO L168 Benchmark]: Boogie Preprocessor took 130.84 ms. Allocated memory was 136.3 MB in the beginning and 197.7 MB in the end (delta: 61.3 MB). Free memory was 90.6 MB in the beginning and 174.9 MB in the end (delta: -84.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,096 INFO L168 Benchmark]: RCFGBuilder took 409.02 ms. Allocated memory is still 197.7 MB. Free memory was 174.9 MB in the beginning and 157.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,097 INFO L168 Benchmark]: TraceAbstraction took 25719.86 ms. Allocated memory was 197.7 MB in the beginning and 254.8 MB in the end (delta: 57.1 MB). Free memory was 157.0 MB in the beginning and 184.2 MB in the end (delta: -27.2 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:24,101 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.11 ms. Allocated memory is still 136.3 MB. Free memory was 101.1 MB in the beginning and 90.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.84 ms. Allocated memory was 136.3 MB in the beginning and 197.7 MB in the end (delta: 61.3 MB). Free memory was 90.6 MB in the beginning and 174.9 MB in the end (delta: -84.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.02 ms. Allocated memory is still 197.7 MB. Free memory was 174.9 MB in the beginning and 157.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25719.86 ms. Allocated memory was 197.7 MB in the beginning and 254.8 MB in the end (delta: 57.1 MB). Free memory was 157.0 MB in the beginning and 184.2 MB in the end (delta: -27.2 MB). Peak memory consumption was 29.9 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)=5, 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); [L29] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=3] [L29] COND TRUE i