/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:37,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:37,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:37,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:37,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:37,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:37,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:37,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:37,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:37,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:37,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:37,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:37,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:37,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:37,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:37,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:37,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:37,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:37,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:37,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:37,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:37,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:37,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:37,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:37,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:37,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:37,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:37,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:37,594 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 [2020-10-23 18:41:37,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:37,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:37,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:37,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:37,631 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:37,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:37,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:37,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:37,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:37,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:37,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:37,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:37,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:37,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:37,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:37,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:37,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:37,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:37,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:37,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:37,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:37,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:37,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:37,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:37,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:37,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:37,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:37,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:37,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:37,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:38,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:38,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:38,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:38,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:38,070 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:38,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-23 18:41:38,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c614bbf/c80b1c19762546728277990931af54b4/FLAGf1b88e5ae [2020-10-23 18:41:38,831 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:38,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-23 18:41:38,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c614bbf/c80b1c19762546728277990931af54b4/FLAGf1b88e5ae [2020-10-23 18:41:39,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c614bbf/c80b1c19762546728277990931af54b4 [2020-10-23 18:41:39,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:39,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:39,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:39,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:39,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:39,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17433d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39, skipping insertion in model container [2020-10-23 18:41:39,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:39,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:39,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:39,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:39,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:39,594 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:39,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39 WrapperNode [2020-10-23 18:41:39,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:39,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:39,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:39,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:39,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (1/1) ... [2020-10-23 18:41:39,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:39,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:39,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:39,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:39,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (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 [2020-10-23 18:41:39,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:39,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:39,736 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:39,736 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:39,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:39,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:39,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:40,079 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:40,080 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 18:41:40,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:40 BoogieIcfgContainer [2020-10-23 18:41:40,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:40,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:40,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:40,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:40,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:39" (1/3) ... [2020-10-23 18:41:40,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4339c0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:40, skipping insertion in model container [2020-10-23 18:41:40,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:39" (2/3) ... [2020-10-23 18:41:40,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4339c0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:40, skipping insertion in model container [2020-10-23 18:41:40,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:40" (3/3) ... [2020-10-23 18:41:40,092 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-10-23 18:41:40,105 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:40,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:40,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:40,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:40,153 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:40,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:40,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:40,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:40,154 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:40,154 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:40,154 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 18:41:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:41:40,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,179 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] [2020-10-23 18:41:40,180 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-23 18:41:40,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512675192] [2020-10-23 18:41:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512675192] [2020-10-23 18:41:40,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:40,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:40,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436221076] [2020-10-23 18:41:40,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:40,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,698 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-23 18:41:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,803 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-23 18:41:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:40,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-23 18:41:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,813 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:41:40,813 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:41:40,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:41:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:41:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:41:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-23 18:41:40,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-23 18:41:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,858 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-23 18:41:40,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-23 18:41:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:41:40,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,860 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] [2020-10-23 18:41:40,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:40,860 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-23 18:41:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533642094] [2020-10-23 18:41:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:41,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533642094] [2020-10-23 18:41:41,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:41,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:41:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463461759] [2020-10-23 18:41:41,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:41,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:41,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:41,006 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-23 18:41:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:41,151 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-23 18:41:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:41,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-23 18:41:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:41,153 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:41:41,153 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:41:41,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:41:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-23 18:41:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:41:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-23 18:41:41,164 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2020-10-23 18:41:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:41,164 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-23 18:41:41,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-23 18:41:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:41:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:41,166 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] [2020-10-23 18:41:41,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:41:41,166 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-23 18:41:41,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253643445] [2020-10-23 18:41:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:41:41,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253643445] [2020-10-23 18:41:41,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:41,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:41:41,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751159232] [2020-10-23 18:41:41,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:41:41,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:41:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:41:41,355 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-23 18:41:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:41,610 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-23 18:41:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:41:41,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-23 18:41:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:41,612 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:41:41,612 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:41:41,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:41:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:41:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-23 18:41:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:41:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-23 18:41:41,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-23 18:41:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:41,621 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-23 18:41:41,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:41:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-23 18:41:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:41:41,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:41,622 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] [2020-10-23 18:41:41,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:41,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash 427046459, now seen corresponding path program 1 times [2020-10-23 18:41:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130730356] [2020-10-23 18:41:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130730356] [2020-10-23 18:41:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038792714] [2020-10-23 18:41:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:41:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:41,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:41,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-23 18:41:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300467653] [2020-10-23 18:41:41,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:41:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:41:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:41:41,916 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-23 18:41:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:42,149 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-23 18:41:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:41:42,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-23 18:41:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:42,151 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:41:42,151 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 18:41:42,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:41:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 18:41:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-23 18:41:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:41:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:41:42,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2020-10-23 18:41:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:42,160 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:41:42,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:41:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:41:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:41:42,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:42,162 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] [2020-10-23 18:41:42,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:42,377 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-23 18:41:42,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:42,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505196430] [2020-10-23 18:41:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:42,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505196430] [2020-10-23 18:41:42,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298972724] [2020-10-23 18:41:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:41:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:43,076 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 13 treesize of output 9 [2020-10-23 18:41:43,077 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:43,089 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-23 18:41:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:43,168 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-10-23 18:41:43,170 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,181 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:43,181 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-10-23 18:41:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:43,281 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2020-10-23 18:41:43,282 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:43,300 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:41:43,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:35 [2020-10-23 18:41:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:41:43,381 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2020-10-23 18:41:43,382 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:43,394 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:43,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:7 [2020-10-23 18:41:43,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:43,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:43,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2020-10-23 18:41:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007000558] [2020-10-23 18:41:43,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:41:43,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:41:43,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:41:43,502 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 27 states. [2020-10-23 18:41:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:44,433 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-23 18:41:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:41:44,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-23 18:41:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:44,435 INFO L225 Difference]: With dead ends: 66 [2020-10-23 18:41:44,435 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:41:44,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:41:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:41:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-23 18:41:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:41:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-23 18:41:44,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-23 18:41:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,448 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-23 18:41:44,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:41:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-23 18:41:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:41:44,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 18:41:44,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:44,663 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 2 times [2020-10-23 18:41:44,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:44,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864570351] [2020-10-23 18:41:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:44,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:44,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864570351] [2020-10-23 18:41:44,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313688499] [2020-10-23 18:41:44,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-23 18:41:44,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:44,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:45,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:45,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-10-23 18:41:45,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703866387] [2020-10-23 18:41:45,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:41:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:41:45,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:41:45,053 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-23 18:41:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:45,384 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-23 18:41:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:41:45,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-23 18:41:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:45,386 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:41:45,386 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:41:45,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:41:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:41:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-23 18:41:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:41:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-23 18:41:45,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 37 [2020-10-23 18:41:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:45,401 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-23 18:41:45,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:41:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-23 18:41:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:41:45,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:45,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:45,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:45,606 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,608 INFO L82 PathProgramCache]: Analyzing trace with hash 553320601, now seen corresponding path program 3 times [2020-10-23 18:41:45,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757162752] [2020-10-23 18:41:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:45,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:45,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:45,785 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:45,785 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:45,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:41:45,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:45 BoogieIcfgContainer [2020-10-23 18:41:45,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:45,846 INFO L168 Benchmark]: Toolchain (without parser) took 6611.98 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 116.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 42.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:45,846 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.5 MB in the end (delta: 71.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:45,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:45,848 INFO L168 Benchmark]: Boogie Preprocessor took 66.10 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:45,849 INFO L168 Benchmark]: RCFGBuilder took 419.14 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.0 MB in the end (delta: -16.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:45,850 INFO L168 Benchmark]: TraceAbstraction took 5759.83 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.3 MB in the beginning and 116.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 44.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:45,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.5 MB in the end (delta: 71.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.10 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 419.14 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.0 MB in the end (delta: -16.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5759.83 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.3 MB in the beginning and 116.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 44.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={3:0}] [L31] COND TRUE i