/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 DAGSIZE --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/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:55:36,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:55:36,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:55:36,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:55:36,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:55:36,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:55:36,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:55:36,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:55:36,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:55:36,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:55:36,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:55:36,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:55:36,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:55:36,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:55:36,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:55:36,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:55:36,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:55:36,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:55:36,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:55:36,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:55:36,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:55:36,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:55:36,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:55:36,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:55:36,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:55:36,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:55:36,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:55:36,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:55:36,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:55:36,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:55:36,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:55:36,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:55:36,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:55:36,809 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:55:36,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:55:36,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:55:36,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:55:36,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:55:36,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:55:36,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:55:36,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:55:36,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:55:36,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:55:36,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:55:36,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:55:36,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:55:36,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:55:36,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:55:36,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:55:36,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:55:36,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:55:36,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:55:36,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:55:36,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:55:36,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:55:36,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:55:36,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:55:36,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:55:36,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 [2020-07-20 03:55:37,338 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:55:37,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:55:37,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:55:37,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:55:37,392 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:55:37,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 03:55:37,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ebf3984/24e7b99ef5804ecda100de811b5aa6dd/FLAG112d36cf4 [2020-07-20 03:55:38,406 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:55:38,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 03:55:38,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ebf3984/24e7b99ef5804ecda100de811b5aa6dd/FLAG112d36cf4 [2020-07-20 03:55:38,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ebf3984/24e7b99ef5804ecda100de811b5aa6dd [2020-07-20 03:55:38,479 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:55:38,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:55:38,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:55:38,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:55:38,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:55:38,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:38,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509fad81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38, skipping insertion in model container [2020-07-20 03:55:38,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:38,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:55:38,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:55:38,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:55:38,919 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:55:38,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:55:38,980 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:55:38,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38 WrapperNode [2020-07-20 03:55:38,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:55:38,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:55:38,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:55:38,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:55:39,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... [2020-07-20 03:55:39,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:55:39,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:55:39,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:55:39,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:55:39,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:55:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:55:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:55:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 03:55:39,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:55:39,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:55:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:55:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 03:55:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 03:55:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:55:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:55:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 03:55:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:55:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 03:55:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:55:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:55:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:55:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:55:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:55:39,837 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:55:39,838 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 03:55:39,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:39 BoogieIcfgContainer [2020-07-20 03:55:39,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:55:39,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:55:39,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:55:39,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:55:39,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:55:38" (1/3) ... [2020-07-20 03:55:39,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b46f693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:39, skipping insertion in model container [2020-07-20 03:55:39,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:38" (2/3) ... [2020-07-20 03:55:39,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b46f693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:39, skipping insertion in model container [2020-07-20 03:55:39,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:39" (3/3) ... [2020-07-20 03:55:39,865 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-20 03:55:39,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:55:39,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:55:39,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:55:39,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:55:39,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:55:39,972 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:55:39,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:55:39,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:55:39,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:55:39,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:55:39,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:55:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 03:55:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:55:40,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:40,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:40,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 03:55:40,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:40,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150585442] [2020-07-20 03:55:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:40,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150585442] [2020-07-20 03:55:40,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:40,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:55:40,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365082281] [2020-07-20 03:55:40,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:55:40,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:55:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:55:40,472 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 03:55:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:40,748 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 03:55:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:40,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 03:55:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:40,772 INFO L225 Difference]: With dead ends: 62 [2020-07-20 03:55:40,773 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 03:55:40,782 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 [2020-07-20 03:55:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 03:55:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 03:55:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 03:55:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 03:55:40,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 03:55:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:40,879 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 03:55:40,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:55:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 03:55:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:55:40,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:40,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:40,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:55:40,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 03:55:40,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:40,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697147242] [2020-07-20 03:55:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:40,944 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:40,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307029409] [2020-07-20 03:55:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4079407b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:41,066 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4079407b issued 2 check-sat command(s) [2020-07-20 03:55:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:55:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:41,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697147242] [2020-07-20 03:55:41,173 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:41,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307029409] [2020-07-20 03:55:41,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:41,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:55:41,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581374522] [2020-07-20 03:55:41,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:41,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:41,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:55:41,186 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 03:55:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:41,408 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 03:55:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:41,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 03:55:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:41,418 INFO L225 Difference]: With dead ends: 56 [2020-07-20 03:55:41,418 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 03:55:41,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:55:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 03:55:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 03:55:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:55:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 03:55:41,454 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 03:55:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:41,455 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 03:55:41,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 03:55:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:55:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:41,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:41,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:55:41,675 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:41,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 03:55:41,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:41,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314661881] [2020-07-20 03:55:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:41,762 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:41,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429518833] [2020-07-20 03:55:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cd597f8 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 [2020-07-20 03:55:41,877 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cd597f8 issued 4 check-sat command(s) [2020-07-20 03:55:41,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:41,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:55:41,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:42,042 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 03:55:42,044 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:55:42,061 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:55:42,062 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:55:42,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 03:55:42,159 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:55:42,161 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 03:55:42,164 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 03:55:42,227 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 03:55:42,229 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:55:42,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 03:55:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:42,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314661881] [2020-07-20 03:55:42,316 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:42,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429518833] [2020-07-20 03:55:42,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:42,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 03:55:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508285760] [2020-07-20 03:55:42,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:55:42,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:55:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:42,321 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-07-20 03:55:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:43,077 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-07-20 03:55:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:55:43,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 03:55:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:43,084 INFO L225 Difference]: With dead ends: 87 [2020-07-20 03:55:43,085 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 03:55:43,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:55:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 03:55:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2020-07-20 03:55:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:55:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-07-20 03:55:43,108 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 28 [2020-07-20 03:55:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:43,109 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-07-20 03:55:43,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:55:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-07-20 03:55:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:55:43,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:43,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:43,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:43,317 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 03:55:43,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:43,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005485757] [2020-07-20 03:55:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:55:43,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005485757] [2020-07-20 03:55:43,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:43,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:55:43,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290641233] [2020-07-20 03:55:43,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:43,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:55:43,486 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2020-07-20 03:55:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:43,766 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-07-20 03:55:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:43,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-20 03:55:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:43,783 INFO L225 Difference]: With dead ends: 92 [2020-07-20 03:55:43,783 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 03:55:43,785 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 [2020-07-20 03:55:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 03:55:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 03:55:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 03:55:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-07-20 03:55:43,832 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-07-20 03:55:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:43,833 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-07-20 03:55:43,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-07-20 03:55:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:55:43,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:43,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:43,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 03:55:43,841 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1029440732, now seen corresponding path program 1 times [2020-07-20 03:55:43,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:43,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095178830] [2020-07-20 03:55:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:43,911 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:43,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924902661] [2020-07-20 03:55:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@327a343a 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 [2020-07-20 03:55:43,999 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@327a343a issued 4 check-sat command(s) [2020-07-20 03:55:44,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:55:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:44,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095178830] [2020-07-20 03:55:44,092 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:44,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924902661] [2020-07-20 03:55:44,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:44,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 03:55:44,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836303218] [2020-07-20 03:55:44,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:55:44,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:55:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:44,105 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2020-07-20 03:55:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:44,478 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-07-20 03:55:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:55:44,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 03:55:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:44,483 INFO L225 Difference]: With dead ends: 109 [2020-07-20 03:55:44,483 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 03:55:44,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 03:55:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-07-20 03:55:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 03:55:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-20 03:55:44,501 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 31 [2020-07-20 03:55:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:44,502 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-20 03:55:44,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:55:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-20 03:55:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:55:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:44,508 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 03:55:44,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:44,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -792264295, now seen corresponding path program 1 times [2020-07-20 03:55:44,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:44,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128455601] [2020-07-20 03:55:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:44,763 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:44,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303792705] [2020-07-20 03:55:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76b234bd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:44,855 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76b234bd issued 4 check-sat command(s) [2020-07-20 03:55:44,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 03:55:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:44,892 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 03:55:44,893 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:55:44,936 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:55:44,938 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:55:44,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 03:55:45,244 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-07-20 03:55:45,245 INFO L350 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2020-07-20 03:55:45,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2020-07-20 03:55:45,251 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:55:45,360 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-07-20 03:55:45,363 INFO L624 ElimStorePlain]: treesize reduction 106, result has 36.5 percent of original size [2020-07-20 03:55:45,369 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:55:45,370 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:7 [2020-07-20 03:55:45,414 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:55:45,416 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 03:55:45,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 03:55:45,435 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-20 03:55:45,436 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:55:45,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-20 03:55:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:45,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128455601] [2020-07-20 03:55:45,482 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:45,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303792705] [2020-07-20 03:55:45,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:45,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 03:55:45,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580609089] [2020-07-20 03:55:45,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:55:45,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:55:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:45,486 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2020-07-20 03:55:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:45,729 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-07-20 03:55:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:55:45,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-07-20 03:55:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:45,731 INFO L225 Difference]: With dead ends: 63 [2020-07-20 03:55:45,732 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 03:55:45,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:55:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 03:55:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2020-07-20 03:55:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:55:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-20 03:55:45,750 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 34 [2020-07-20 03:55:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:45,752 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-20 03:55:45,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:55:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-20 03:55:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:55:45,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:45,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:45,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:45,970 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 03:55:45,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:45,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097854542] [2020-07-20 03:55:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:46,026 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:46,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460517472] [2020-07-20 03:55:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@549e119 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 [2020-07-20 03:55:47,876 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@549e119 issued 4 check-sat command(s) [2020-07-20 03:55:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:55:47,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:55:47,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097854542] [2020-07-20 03:55:47,993 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:47,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460517472] [2020-07-20 03:55:47,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:47,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 03:55:47,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806657702] [2020-07-20 03:55:47,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:55:47,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:55:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:47,997 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 7 states. [2020-07-20 03:55:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:48,290 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-20 03:55:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:55:48,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-20 03:55:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:48,294 INFO L225 Difference]: With dead ends: 90 [2020-07-20 03:55:48,294 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 03:55:48,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 03:55:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 03:55:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:55:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-20 03:55:48,313 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2020-07-20 03:55:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:48,313 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-20 03:55:48,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:55:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-20 03:55:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 03:55:48,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:48,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:48,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:55:48,530 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 03:55:48,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:48,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135618040] [2020-07-20 03:55:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@251dee2c [2020-07-20 03:55:48,564 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:48,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453276629] [2020-07-20 03:55:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a8060a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:48,695 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a8060a issued 4 check-sat command(s) [2020-07-20 03:55:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 03:55:48,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:55:48,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:48,783 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:55:48,784 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:55:48,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:49,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:55:49 BoogieIcfgContainer [2020-07-20 03:55:49,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:55:49,163 INFO L168 Benchmark]: Toolchain (without parser) took 10681.79 ms. Allocated memory was 136.8 MB in the beginning and 248.5 MB in the end (delta: 111.7 MB). Free memory was 101.9 MB in the beginning and 105.2 MB in the end (delta: -3.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,165 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 495.11 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,167 INFO L168 Benchmark]: Boogie Preprocessor took 207.53 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,168 INFO L168 Benchmark]: RCFGBuilder took 655.92 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 164.2 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,174 INFO L168 Benchmark]: TraceAbstraction took 9311.25 ms. Allocated memory was 203.4 MB in the beginning and 248.5 MB in the end (delta: 45.1 MB). Free memory was 163.5 MB in the beginning and 105.2 MB in the end (delta: 58.3 MB). Peak memory consumption was 103.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:49,180 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 495.11 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.53 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 655.92 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 164.2 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9311.25 ms. Allocated memory was 203.4 MB in the beginning and 248.5 MB in the end (delta: 45.1 MB). Free memory was 163.5 MB in the beginning and 105.2 MB in the end (delta: 58.3 MB). Peak memory consumption was 103.4 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)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [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={-1:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L29] COND TRUE i