/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/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:44:33,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:44:33,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:44:33,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:44:33,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:44:33,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:44:33,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:44:33,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:44:33,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:44:33,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:44:33,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:44:33,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:44:33,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:44:33,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:44:33,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:44:33,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:44:33,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:44:33,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:44:33,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:44:33,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:44:33,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:44:33,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:44:33,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:44:33,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:44:33,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:44:33,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:44:33,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:44:33,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:44:33,566 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 18:44:33,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:44:33,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:44:33,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:44:33,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:44:33,629 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:44:33,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:44:33,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:44:33,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:44:33,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:44:33,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:44:33,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:44:33,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:44:33,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:44:33,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:44:33,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:44:33,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:44:33,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:44:33,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:44:33,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:44:33,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:44:33,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:44:33,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:44:33,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:44:33,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:44:33,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:44:33,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:44:33,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:44:33,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:44:33,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:44:33,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:44:34,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:44:34,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:44:34,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:44:34,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:44:34,145 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:44:34,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-10-23 18:44:34,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2593f373c/d7463504c1cb4081b5f28d2eb1b61d3e/FLAG35d810e5a [2020-10-23 18:44:34,906 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:44:34,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2020-10-23 18:44:34,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2593f373c/d7463504c1cb4081b5f28d2eb1b61d3e/FLAG35d810e5a [2020-10-23 18:44:35,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2593f373c/d7463504c1cb4081b5f28d2eb1b61d3e [2020-10-23 18:44:35,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:44:35,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:44:35,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:35,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:44:35,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:44:35,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cc575a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35, skipping insertion in model container [2020-10-23 18:44:35,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:44:35,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:44:35,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:35,471 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:44:35,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:35,509 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:44:35,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35 WrapperNode [2020-10-23 18:44:35,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:35,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:44:35,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:44:35,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:44:35,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (1/1) ... [2020-10-23 18:44:35,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:44:35,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:44:35,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:44:35,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:44:35,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (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 18:44:35,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:44:35,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:44:35,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:44:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:44:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:44:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:44:35,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:44:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:44:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:44:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:44:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:44:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:44:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:44:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:44:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:44:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:44:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:44:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:44:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:44:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:44:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:44:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:44:36,039 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:44:36,040 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:44:36,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:36 BoogieIcfgContainer [2020-10-23 18:44:36,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:44:36,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:44:36,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:44:36,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:44:36,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:44:35" (1/3) ... [2020-10-23 18:44:36,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b443f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:36, skipping insertion in model container [2020-10-23 18:44:36,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:35" (2/3) ... [2020-10-23 18:44:36,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b443f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:36, skipping insertion in model container [2020-10-23 18:44:36,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:36" (3/3) ... [2020-10-23 18:44:36,076 INFO L111 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-10-23 18:44:36,090 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:44:36,096 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:44:36,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:44:36,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:44:36,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:44:36,164 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:44:36,165 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:44:36,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:44:36,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:44:36,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:44:36,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:44:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 18:44:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:44:36,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:36,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:36,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash -245613270, now seen corresponding path program 1 times [2020-10-23 18:44:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142461908] [2020-10-23 18:44:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:36,568 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 18:44:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:36,614 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 18:44:36,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142461908] [2020-10-23 18:44:36,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:36,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:44:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610830922] [2020-10-23 18:44:36,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:44:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:44:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:44:36,659 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-23 18:44:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:36,760 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-23 18:44:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:44:36,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-23 18:44:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:36,772 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:44:36,772 INFO L226 Difference]: Without dead ends: 16 [2020-10-23 18:44:36,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:44:36,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-23 18:44:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-23 18:44:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:44:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-23 18:44:36,821 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 15 [2020-10-23 18:44:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:36,822 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-23 18:44:36,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:44:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-23 18:44:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:44:36,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:36,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:36,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:44:36,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1373079982, now seen corresponding path program 1 times [2020-10-23 18:44:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476011240] [2020-10-23 18:44:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:37,172 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 18:44:37,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476011240] [2020-10-23 18:44:37,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:37,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:44:37,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759295379] [2020-10-23 18:44:37,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:44:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:44:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:44:37,184 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-23 18:44:37,543 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-23 18:44:37,761 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-23 18:44:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:37,982 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-23 18:44:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:37,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-23 18:44:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:37,984 INFO L225 Difference]: With dead ends: 25 [2020-10-23 18:44:37,985 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:44:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:44:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:44:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:44:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-23 18:44:37,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-23 18:44:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:37,994 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-23 18:44:37,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:44:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-23 18:44:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:44:37,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:38,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:38,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:44:38,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash 612327496, now seen corresponding path program 1 times [2020-10-23 18:44:38,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:38,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50447045] [2020-10-23 18:44:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:38,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50447045] [2020-10-23 18:44:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913192941] [2020-10-23 18:44:38,350 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 18:44:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 18:44:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:38,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:38,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:38,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-10-23 18:44:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615914694] [2020-10-23 18:44:38,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:44:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:44:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:38,714 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2020-10-23 18:44:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:39,265 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-23 18:44:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:39,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-23 18:44:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:39,267 INFO L225 Difference]: With dead ends: 26 [2020-10-23 18:44:39,267 INFO L226 Difference]: Without dead ends: 18 [2020-10-23 18:44:39,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:44:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-23 18:44:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-23 18:44:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:44:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-23 18:44:39,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-23 18:44:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:39,276 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-23 18:44:39,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:44:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-23 18:44:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:44:39,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:39,278 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:39,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:44:39,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1496163090, now seen corresponding path program 2 times [2020-10-23 18:44:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:39,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303265949] [2020-10-23 18:44:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:39,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303265949] [2020-10-23 18:44:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581914899] [2020-10-23 18:44:39,756 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 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 18:44:39,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:44:39,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:44:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:44:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:39,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:39,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:39,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-10-23 18:44:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806643642] [2020-10-23 18:44:39,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:44:39,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:44:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:44:39,942 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2020-10-23 18:44:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:40,502 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-23 18:44:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:44:40,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-23 18:44:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:40,504 INFO L225 Difference]: With dead ends: 30 [2020-10-23 18:44:40,504 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:44:40,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:44:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:44:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:44:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:44:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-23 18:44:40,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-23 18:44:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:40,519 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-23 18:44:40,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:44:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-23 18:44:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:44:40,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:40,520 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:40,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:40,722 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:40,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1469751250, now seen corresponding path program 3 times [2020-10-23 18:44:40,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:40,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586286164] [2020-10-23 18:44:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:41,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586286164] [2020-10-23 18:44:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022213594] [2020-10-23 18:44:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 18:44:41,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:44:41,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:44:41,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:44:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:41,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:41,268 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 18:44:41,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:41,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-23 18:44:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683671101] [2020-10-23 18:44:41,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:44:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:44:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:44:41,271 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-10-23 18:44:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:41,951 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-23 18:44:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:44:41,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-10-23 18:44:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:41,952 INFO L225 Difference]: With dead ends: 23 [2020-10-23 18:44:41,952 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:41,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:44:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:41,958 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-23 18:44:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:41,958 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:41,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:44:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:41,959 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:42,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:42,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:42,386 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:42,386 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:42,386 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:42,386 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:42,387 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:42,387 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:42,387 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-23 18:44:42,387 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:42,388 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:42,388 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:42,388 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:42,388 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:42,388 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:42,388 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:42,388 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:42,389 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:42,389 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 39) the Hoare annotation is: true [2020-10-23 18:44:42,389 INFO L270 CegarLoopResult]: At program point L31-2(lines 31 34) the Hoare annotation is: (let ((.cse1 (+ main_~y~0 main_~i~0)) (.cse0 (+ main_~x~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-23 18:44:42,389 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-23 18:44:42,389 INFO L274 CegarLoopResult]: For program point L31-3(lines 24 39) no Hoare annotation was computed. [2020-10-23 18:44:42,389 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 39) no Hoare annotation was computed. [2020-10-23 18:44:42,389 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 39) no Hoare annotation was computed. [2020-10-23 18:44:42,390 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~y~0 0) (< 0 (+ main_~y~0 1))) [2020-10-23 18:44:42,390 INFO L274 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-10-23 18:44:42,390 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:42,390 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:42,390 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:42,390 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:44:42,390 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:42,390 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:42,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:42 BoogieIcfgContainer [2020-10-23 18:44:42,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:42,418 INFO L168 Benchmark]: Toolchain (without parser) took 7172.09 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 126.5 MB in the beginning and 76.6 MB in the end (delta: 49.9 MB). Peak memory consumption was 81.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:42,419 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:42,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:42,429 INFO L168 Benchmark]: Boogie Preprocessor took 38.78 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:42,430 INFO L168 Benchmark]: RCFGBuilder took 491.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 100.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:42,431 INFO L168 Benchmark]: TraceAbstraction took 6345.47 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 134.0 MB in the beginning and 76.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:42,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.78 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 491.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 100.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6345.47 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 134.0 MB in the beginning and 76.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: x + j <= y + i && y + i <= x + j - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 90 SDslu, 156 SDs, 0 SdLazy, 321 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 25 PreInvPairs, 36 NumberOfFragments, 57 HoareAnnotationTreeSize, 25 FomulaSimplifications, 219 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 424 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 12174 SizeOfPredicates, 15 NumberOfNonLiveVariables, 305 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...