/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/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:36:59,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:36:59,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:36:59,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:36:59,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:36:59,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:36:59,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:36:59,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:36:59,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:36:59,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:36:59,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:36:59,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:36:59,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:36:59,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:36:59,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:36:59,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:36:59,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:36:59,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:36:59,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:36:59,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:36:59,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:36:59,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:36:59,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:36:59,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:36:59,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:36:59,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:36:59,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:36:59,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:36:59,334 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 23:36:59,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:36:59,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:36:59,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:36:59,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:36:59,369 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:36:59,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:36:59,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:36:59,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:36:59,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:36:59,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:36:59,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:36:59,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:36:59,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:36:59,373 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:36:59,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:36:59,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:36:59,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:36:59,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:36:59,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:36:59,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:36:59,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:36:59,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:36:59,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:36:59,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:36:59,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:36:59,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:36:59,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:36:59,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:36:59,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:36:59,377 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 23:36:59,651 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:36:59,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:36:59,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:36:59,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:36:59,669 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:36:59,670 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-19 23:36:59,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c0f15fe/8fd9337b046d49db806e1cb4d1b0baa2/FLAGc952317d7 [2020-07-19 23:37:00,185 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:37:00,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-19 23:37:00,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c0f15fe/8fd9337b046d49db806e1cb4d1b0baa2/FLAGc952317d7 [2020-07-19 23:37:00,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c0f15fe/8fd9337b046d49db806e1cb4d1b0baa2 [2020-07-19 23:37:00,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:37:00,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:37:00,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:37:00,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:37:00,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:37:00,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afb3411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00, skipping insertion in model container [2020-07-19 23:37:00,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:37:00,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:37:00,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:37:00,771 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:37:00,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:37:00,808 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:37:00,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00 WrapperNode [2020-07-19 23:37:00,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:37:00,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:37:00,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:37:00,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:37:00,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (1/1) ... [2020-07-19 23:37:00,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:37:00,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:37:00,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:37:00,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:37:00,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (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 23:37:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:37:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:37:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:37:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:37:00,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:37:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:37:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:37:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:37:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:37:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:37:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:37:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:37:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:37:01,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:37:01,331 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 23:37:01,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:37:01 BoogieIcfgContainer [2020-07-19 23:37:01,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:37:01,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:37:01,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:37:01,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:37:01,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:37:00" (1/3) ... [2020-07-19 23:37:01,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636706c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:37:01, skipping insertion in model container [2020-07-19 23:37:01,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:37:00" (2/3) ... [2020-07-19 23:37:01,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636706c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:37:01, skipping insertion in model container [2020-07-19 23:37:01,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:37:01" (3/3) ... [2020-07-19 23:37:01,342 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-19 23:37:01,350 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:37:01,355 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:37:01,365 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:37:01,386 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:37:01,387 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:37:01,387 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:37:01,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:37:01,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:37:01,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:37:01,388 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:37:01,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:37:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-19 23:37:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:37:01,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:01,412 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] [2020-07-19 23:37:01,412 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-19 23:37:01,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:01,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65685199] [2020-07-19 23:37:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:01,598 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 23:37:01,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65685199] [2020-07-19 23:37:01,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:37:01,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:37:01,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876738694] [2020-07-19 23:37:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:37:01,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:01,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:37:01,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:37:01,621 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-19 23:37:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:01,765 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-19 23:37:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:37:01,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 23:37:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:01,779 INFO L225 Difference]: With dead ends: 62 [2020-07-19 23:37:01,780 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 23:37:01,786 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 23:37:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 23:37:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-19 23:37:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:37:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-19 23:37:01,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-19 23:37:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:01,824 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-19 23:37:01,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:37:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-19 23:37:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:37:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:01,826 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] [2020-07-19 23:37:01,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:37:01,826 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-19 23:37:01,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:01,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64244166] [2020-07-19 23:37:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:01,851 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:01,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276629930] [2020-07-19 23:37:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb2e6eb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:01,923 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1eb2e6eb issued 2 check-sat command(s) [2020-07-19 23:37:01,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:37:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:01,975 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 23:37:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64244166] [2020-07-19 23:37:01,976 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276629930] [2020-07-19 23:37:01,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:37:01,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:37:01,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223446578] [2020-07-19 23:37:01,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:37:01,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:37:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:37:01,980 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-19 23:37:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:02,058 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-19 23:37:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:37:02,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-19 23:37:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:02,062 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:37:02,063 INFO L226 Difference]: Without dead ends: 41 [2020-07-19 23:37:02,064 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 [2020-07-19 23:37:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-19 23:37:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-19 23:37:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:37:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 23:37:02,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-19 23:37:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:02,077 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 23:37:02,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:37:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 23:37:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:37:02,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:02,079 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] [2020-07-19 23:37:02,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:37:02,295 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-19 23:37:02,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:02,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731948506] [2020-07-19 23:37:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:02,329 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:02,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695897757] [2020-07-19 23:37:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fe08bd4 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 [2020-07-19 23:37:02,402 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fe08bd4 issued 4 check-sat command(s) [2020-07-19 23:37:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:37:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:02,477 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 [2020-07-19 23:37:02,478 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:37:02,488 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:37:02,488 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:37:02,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-19 23:37:02,551 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:37:02,552 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 [2020-07-19 23:37:02,553 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-19 23:37:02,565 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-19 23:37:02,566 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:37:02,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-19 23:37:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:37:02,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731948506] [2020-07-19 23:37:02,600 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:02,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695897757] [2020-07-19 23:37:02,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:37:02,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 23:37:02,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375614142] [2020-07-19 23:37:02,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:37:02,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:37:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:37:02,602 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-07-19 23:37:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:02,982 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-07-19 23:37:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:37:02,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-19 23:37:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:02,988 INFO L225 Difference]: With dead ends: 87 [2020-07-19 23:37:02,991 INFO L226 Difference]: Without dead ends: 85 [2020-07-19 23:37:02,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:37:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-19 23:37:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2020-07-19 23:37:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:37:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-07-19 23:37:03,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 28 [2020-07-19 23:37:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:03,021 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-07-19 23:37:03,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:37:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-07-19 23:37:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:37:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:03,022 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] [2020-07-19 23:37:03,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:03,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-19 23:37:03,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:03,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517660492] [2020-07-19 23:37:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:37:03,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517660492] [2020-07-19 23:37:03,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:37:03,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:37:03,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476118815] [2020-07-19 23:37:03,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:37:03,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:37:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:37:03,363 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2020-07-19 23:37:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:03,464 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-07-19 23:37:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:37:03,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-19 23:37:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:03,467 INFO L225 Difference]: With dead ends: 92 [2020-07-19 23:37:03,467 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 23:37:03,468 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 [2020-07-19 23:37:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 23:37:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-19 23:37:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-19 23:37:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-07-19 23:37:03,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-07-19 23:37:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:03,478 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-07-19 23:37:03,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:37:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-07-19 23:37:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:37:03,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:03,480 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] [2020-07-19 23:37:03,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 23:37:03,481 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1029440732, now seen corresponding path program 1 times [2020-07-19 23:37:03,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:03,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167933981] [2020-07-19 23:37:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:03,503 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:03,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311488967] [2020-07-19 23:37:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@619ce3fa 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 [2020-07-19 23:37:03,562 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@619ce3fa issued 4 check-sat command(s) [2020-07-19 23:37:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:37:03,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:37:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167933981] [2020-07-19 23:37:03,619 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311488967] [2020-07-19 23:37:03,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:37:03,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 23:37:03,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157845625] [2020-07-19 23:37:03,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:37:03,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:37:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:37:03,622 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2020-07-19 23:37:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:03,788 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-07-19 23:37:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:37:03,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-19 23:37:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:03,790 INFO L225 Difference]: With dead ends: 109 [2020-07-19 23:37:03,790 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 23:37:03,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:37:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 23:37:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-07-19 23:37:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-19 23:37:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-19 23:37:03,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 31 [2020-07-19 23:37:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:03,802 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-19 23:37:03,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:37:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-19 23:37:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:37:03,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:03,804 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] [2020-07-19 23:37:04,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:04,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:04,020 INFO L82 PathProgramCache]: Analyzing trace with hash -792264295, now seen corresponding path program 1 times [2020-07-19 23:37:04,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:04,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73689451] [2020-07-19 23:37:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:04,042 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:04,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494363964] [2020-07-19 23:37:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5d588d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:04,114 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5d588d issued 4 check-sat command(s) [2020-07-19 23:37:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:37:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:04,132 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 [2020-07-19 23:37:04,132 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:37:04,136 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:37:04,136 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:37:04,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-19 23:37:04,276 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-07-19 23:37:04,277 INFO L350 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2020-07-19 23:37:04,278 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 [2020-07-19 23:37:04,281 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:37:04,337 INFO L624 ElimStorePlain]: treesize reduction 106, result has 36.5 percent of original size [2020-07-19 23:37:04,340 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:37:04,340 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:7 [2020-07-19 23:37:04,378 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:37:04,378 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 [2020-07-19 23:37:04,379 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-19 23:37:04,392 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-19 23:37:04,393 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:37:04,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-19 23:37:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:37:04,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73689451] [2020-07-19 23:37:04,423 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:04,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494363964] [2020-07-19 23:37:04,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:37:04,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-19 23:37:04,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194580634] [2020-07-19 23:37:04,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:37:04,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:37:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:37:04,427 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2020-07-19 23:37:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:04,549 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-07-19 23:37:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:37:04,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-07-19 23:37:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:04,551 INFO L225 Difference]: With dead ends: 63 [2020-07-19 23:37:04,551 INFO L226 Difference]: Without dead ends: 61 [2020-07-19 23:37:04,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:37:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-19 23:37:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2020-07-19 23:37:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:37:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-19 23:37:04,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 34 [2020-07-19 23:37:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:04,571 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-19 23:37:04,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:37:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-19 23:37:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 23:37:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:04,573 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] [2020-07-19 23:37:04,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:04,789 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-19 23:37:04,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:04,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939727174] [2020-07-19 23:37:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:04,823 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:04,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395080094] [2020-07-19 23:37:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b1370cc 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 [2020-07-19 23:37:05,749 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b1370cc issued 4 check-sat command(s) [2020-07-19 23:37:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:37:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:37:05,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939727174] [2020-07-19 23:37:05,810 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:37:05,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395080094] [2020-07-19 23:37:05,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:37:05,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 23:37:05,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805430861] [2020-07-19 23:37:05,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:37:05,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:37:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:37:05,812 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 7 states. [2020-07-19 23:37:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:05,952 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-19 23:37:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:37:05,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-19 23:37:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:05,954 INFO L225 Difference]: With dead ends: 90 [2020-07-19 23:37:05,954 INFO L226 Difference]: Without dead ends: 55 [2020-07-19 23:37:05,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:37:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-19 23:37:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-19 23:37:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:37:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-19 23:37:05,972 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2020-07-19 23:37:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:05,972 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-19 23:37:05,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:37:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-19 23:37:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 23:37:05,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:05,976 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] [2020-07-19 23:37:06,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:37:06,177 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-19 23:37:06,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:06,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756059563] [2020-07-19 23:37:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d24b2d1 [2020-07-19 23:37:06,202 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:37:06,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929127950] [2020-07-19 23:37:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35c5856b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:06,274 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35c5856b issued 4 check-sat command(s) [2020-07-19 23:37:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-19 23:37:06,274 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:37:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:37:06,293 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:37:06,319 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:37:06,319 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:37:06,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:06,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:37:06 BoogieIcfgContainer [2020-07-19 23:37:06,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:37:06,573 INFO L168 Benchmark]: Toolchain (without parser) took 6016.74 ms. Allocated memory was 138.9 MB in the beginning and 244.8 MB in the end (delta: 105.9 MB). Free memory was 103.7 MB in the beginning and 95.4 MB in the end (delta: 8.3 MB). Peak memory consumption was 114.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,574 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,576 INFO L168 Benchmark]: Boogie Preprocessor took 112.07 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 180.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,576 INFO L168 Benchmark]: RCFGBuilder took 413.29 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,577 INFO L168 Benchmark]: TraceAbstraction took 5236.03 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 162.7 MB in the beginning and 95.4 MB in the end (delta: 67.3 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:37:06,581 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.07 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 180.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.29 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5236.03 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 162.7 MB in the beginning and 95.4 MB in the end (delta: 67.3 MB). Peak memory consumption was 108.7 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