/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:37:07,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:37:07,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:37:07,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:37:07,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:37:07,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:37:07,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:37:07,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:37:07,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:37:07,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:37:07,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:37:07,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:37:07,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:37:07,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:37:07,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:37:07,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:37:07,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:37:07,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:37:07,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:37:07,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:37:07,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:37:07,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:37:07,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:37:07,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:37:07,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:37:07,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:37:07,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:37:07,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:37:07,987 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 [2020-07-19 23:37:08,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:37:08,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:37:08,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:37:08,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:37:08,029 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:37:08,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:37:08,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:37:08,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:37:08,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:37:08,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:37:08,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:37:08,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:37:08,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:37:08,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:37:08,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:37:08,035 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:37:08,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:37:08,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:37:08,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:37:08,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:37:08,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:37:08,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:37:08,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:37:08,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:37:08,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:37:08,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:37:08,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:37:08,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:37:08,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:37:08,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:37:08,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:37:08,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:37:08,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:37:08,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:37:08,508 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:37:08,509 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-19 23:37:08,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f56bc83/ac9ac317f92d4a42b34e51d8801d3e98/FLAGcf2bf8107 [2020-07-19 23:37:09,139 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:37:09,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-19 23:37:09,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f56bc83/ac9ac317f92d4a42b34e51d8801d3e98/FLAGcf2bf8107 [2020-07-19 23:37:09,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f56bc83/ac9ac317f92d4a42b34e51d8801d3e98 [2020-07-19 23:37:09,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:37:09,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:37:09,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:37:09,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:37:09,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:37:09,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:09,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2f8691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09, skipping insertion in model container [2020-07-19 23:37:09,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:09,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:37:09,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:37:09,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:37:09,833 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:37:09,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:37:09,876 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:37:09,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09 WrapperNode [2020-07-19 23:37:09,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:37:09,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:37:09,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:37:09,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:37:09,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (1/1) ... [2020-07-19 23:37:10,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:37:10,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:37:10,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:37:10,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:37:10,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (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 [2020-07-19 23:37:10,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:37:10,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:37:10,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:37:10,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:37:10,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:37:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:37:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:37:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:37:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:37:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:37:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:37:10,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:37:10,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:37:10,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:37:10,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:37:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:37:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:37:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:37:10,711 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:37:10,712 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-19 23:37:10,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:37:10 BoogieIcfgContainer [2020-07-19 23:37:10,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:37:10,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:37:10,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:37:10,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:37:10,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:37:09" (1/3) ... [2020-07-19 23:37:10,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357e2733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:37:10, skipping insertion in model container [2020-07-19 23:37:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:09" (2/3) ... [2020-07-19 23:37:10,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357e2733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:37:10, skipping insertion in model container [2020-07-19 23:37:10,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:37:10" (3/3) ... [2020-07-19 23:37:10,732 INFO L109 eAbstractionObserver]: Analyzing ICFG ifncompf.c [2020-07-19 23:37:10,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:37:10,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:37:10,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:37:10,811 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:37:10,811 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:37:10,811 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:37:10,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:37:10,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:37:10,812 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:37:10,812 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:37:10,812 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:37:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-19 23:37:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:37:10,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:10,847 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] [2020-07-19 23:37:10,848 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:10,855 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-19 23:37:10,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:10,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921662294] [2020-07-19 23:37:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72e2f1c7 [2020-07-19 23:37:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:37:11,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921662294] [2020-07-19 23:37:11,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:37:11,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:37:11,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596082315] [2020-07-19 23:37:11,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:37:11,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:37:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:37:11,183 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-07-19 23:37:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:11,376 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-07-19 23:37:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:37:11,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-19 23:37:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:11,394 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:37:11,395 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:37:11,401 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 [2020-07-19 23:37:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:37:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-19 23:37:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:37:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-19 23:37:11,470 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-07-19 23:37:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:11,471 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-19 23:37:11,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:37:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-19 23:37:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:37:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:11,473 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] [2020-07-19 23:37:11,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:37:11,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-07-19 23:37:11,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:11,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440393264] [2020-07-19 23:37:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72e2f1c7 [2020-07-19 23:37:11,513 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:11,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839382745] [2020-07-19 23:37:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df38411 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:11,606 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df38411 issued 2 check-sat command(s) [2020-07-19 23:37:11,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:37:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:37:11,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440393264] [2020-07-19 23:37:11,680 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:11,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839382745] [2020-07-19 23:37:11,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:37:11,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:37:11,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406462971] [2020-07-19 23:37:11,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:37:11,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:37:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:37:11,686 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-07-19 23:37:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:11,901 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-07-19 23:37:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:37:11,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-19 23:37:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:11,908 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:37:11,908 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:37:11,910 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 [2020-07-19 23:37:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:37:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-19 23:37:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 23:37:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-19 23:37:11,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-19 23:37:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:11,933 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-19 23:37:11,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:37:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-19 23:37:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:37:11,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:11,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:37:12,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:37:12,151 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-19 23:37:12,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:12,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935814992] [2020-07-19 23:37:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72e2f1c7 [2020-07-19 23:37:12,198 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:12,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905822347] [2020-07-19 23:37:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42515b79 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