/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/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:47:59,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:47:59,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:47:59,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:47:59,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:47:59,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:47:59,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:47:59,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:47:59,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:47:59,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:47:59,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:47:59,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:47:59,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:47:59,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:47:59,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:47:59,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:47:59,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:47:59,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:47:59,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:47:59,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:47:59,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:47:59,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:47:59,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:47:59,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:47:59,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:47:59,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:47:59,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:47:59,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:47:59,707 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 [2020-11-06 22:47:59,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:47:59,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:47:59,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:47:59,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:47:59,770 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:47:59,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:47:59,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:47:59,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:47:59,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:47:59,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:47:59,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:47:59,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:47:59,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:47:59,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:47:59,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:47:59,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:47:59,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:47:59,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:47:59,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:47:59,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:47:59,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:47:59,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:59,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:47:59,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:47:59,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:47:59,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:47:59,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:47:59,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:47:59,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:47:59,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:48:00,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:48:00,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:48:00,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:48:00,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:48:00,260 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:48:00,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-11-06 22:48:00,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1c89cbb/6d696303a1094c6486fe4502bc504f69/FLAG40923d992 [2020-11-06 22:48:01,008 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:48:01,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-11-06 22:48:01,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1c89cbb/6d696303a1094c6486fe4502bc504f69/FLAG40923d992 [2020-11-06 22:48:01,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1c89cbb/6d696303a1094c6486fe4502bc504f69 [2020-11-06 22:48:01,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:48:01,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:48:01,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:48:01,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:48:01,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:48:01,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@829c93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01, skipping insertion in model container [2020-11-06 22:48:01,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:48:01,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:48:01,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:48:01,586 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:48:01,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:48:01,623 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:48:01,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01 WrapperNode [2020-11-06 22:48:01,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:48:01,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:48:01,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:48:01,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:48:01,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (1/1) ... [2020-11-06 22:48:01,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:48:01,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:48:01,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:48:01,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:48:01,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (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 [2020-11-06 22:48:01,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:48:01,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:48:01,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:48:01,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:48:01,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:48:01,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:48:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:48:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:48:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:48:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:48:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:48:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:48:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:48:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:48:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:48:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:48:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:48:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:48:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:48:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:48:02,242 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:48:02,242 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:48:02,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:02 BoogieIcfgContainer [2020-11-06 22:48:02,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:48:02,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:48:02,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:48:02,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:48:02,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:01" (1/3) ... [2020-11-06 22:48:02,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e5ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:02, skipping insertion in model container [2020-11-06 22:48:02,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:01" (2/3) ... [2020-11-06 22:48:02,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e5ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:02, skipping insertion in model container [2020-11-06 22:48:02,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:02" (3/3) ... [2020-11-06 22:48:02,261 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-11-06 22:48:02,280 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:48:02,284 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:48:02,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:48:02,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:48:02,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:48:02,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:48:02,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:48:02,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:48:02,355 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:48:02,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:48:02,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:48:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-06 22:48:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:48:02,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:02,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:02,393 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 619537921, now seen corresponding path program 1 times [2020-11-06 22:48:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:02,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732283412] [2020-11-06 22:48:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:02,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:48:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732283412] [2020-11-06 22:48:02,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:48:02,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:48:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090041505] [2020-11-06 22:48:02,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:48:02,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:48:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:48:02,740 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-06 22:48:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:02,821 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-11-06 22:48:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:48:02,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:48:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:02,834 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:48:02,835 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:48:02,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:48:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:48:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:48:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:48:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-06 22:48:02,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-11-06 22:48:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:02,890 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-06 22:48:02,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:48:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-06 22:48:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:48:02,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:02,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:02,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:48:02,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash 674949181, now seen corresponding path program 1 times [2020-11-06 22:48:02,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:02,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18241508] [2020-11-06 22:48:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:02,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:02,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214006263] [2020-11-06 22:48:02,916 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 [2020-11-06 22:48:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:48:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:03,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18241508] [2020-11-06 22:48:03,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:03,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214006263] [2020-11-06 22:48:03,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:48:03,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:48:03,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638178480] [2020-11-06 22:48:03,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:48:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:03,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:48:03,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:48:03,074 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-06 22:48:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:03,131 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-06 22:48:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:48:03,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-06 22:48:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:03,133 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:48:03,134 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:48:03,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:48:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:48:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-06 22:48:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:48:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-06 22:48:03,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2020-11-06 22:48:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:03,148 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-06 22:48:03,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:48:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-06 22:48:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:48:03,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:03,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:03,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:48:03,364 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash -722961082, now seen corresponding path program 1 times [2020-11-06 22:48:03,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:03,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565833971] [2020-11-06 22:48:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:03,391 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:03,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159855534] [2020-11-06 22:48:03,392 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 [2020-11-06 22:48:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:48:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:03,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565833971] [2020-11-06 22:48:03,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:03,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159855534] [2020-11-06 22:48:03,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:48:03,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-06 22:48:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070777096] [2020-11-06 22:48:03,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:48:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:48:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:48:03,566 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-11-06 22:48:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:03,635 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-06 22:48:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:48:03,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-06 22:48:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:03,637 INFO L225 Difference]: With dead ends: 35 [2020-11-06 22:48:03,637 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:48:03,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:48:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:48:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-06 22:48:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-06 22:48:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-06 22:48:03,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2020-11-06 22:48:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:03,650 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-06 22:48:03,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:48:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-06 22:48:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:48:03,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:03,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:03,867 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1314661347, now seen corresponding path program 2 times [2020-11-06 22:48:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568742373] [2020-11-06 22:48:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:03,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:03,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829225779] [2020-11-06 22:48:03,886 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 [2020-11-06 22:48:03,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:48:03,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:48:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 22:48:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:48:04,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568742373] [2020-11-06 22:48:04,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:04,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829225779] [2020-11-06 22:48:04,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:48:04,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:48:04,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556102779] [2020-11-06 22:48:04,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:48:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:48:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:48:04,052 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2020-11-06 22:48:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:04,157 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-06 22:48:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:48:04,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-06 22:48:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:04,164 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:48:04,164 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:48:04,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:48:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:48:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:48:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:48:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:48:04,178 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 26 [2020-11-06 22:48:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:04,178 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:48:04,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:48:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:48:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:48:04,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:04,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:04,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:04,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 153054566, now seen corresponding path program 3 times [2020-11-06 22:48:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:04,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731658233] [2020-11-06 22:48:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:04,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:04,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549666513] [2020-11-06 22:48:04,410 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:04,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 22:48:04,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:48:04,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:48:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:04,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731658233] [2020-11-06 22:48:04,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:04,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549666513] [2020-11-06 22:48:04,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-11-06 22:48:04,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:48:04,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-06 22:48:04,514 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-11-06 22:48:04,514 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:48:04,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:04,750 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-06 22:48:04,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:48:04 BoogieIcfgContainer [2020-11-06 22:48:04,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:48:04,754 INFO L168 Benchmark]: Toolchain (without parser) took 3384.22 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 107.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:48:04,754 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:48:04,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.17 ms. Allocated memory is still 153.1 MB. Free memory was 128.2 MB in the beginning and 118.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:48:04,756 INFO L168 Benchmark]: Boogie Preprocessor took 54.22 ms. Allocated memory is still 153.1 MB. Free memory was 118.7 MB in the beginning and 117.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:48:04,757 INFO L168 Benchmark]: RCFGBuilder took 564.48 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 136.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:48:04,758 INFO L168 Benchmark]: TraceAbstraction took 2501.75 ms. Allocated memory is still 153.1 MB. Free memory was 136.2 MB in the beginning and 107.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 29.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:48:04,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.17 ms. Allocated memory is still 153.1 MB. Free memory was 128.2 MB in the beginning and 118.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.22 ms. Allocated memory is still 153.1 MB. Free memory was 118.7 MB in the beginning and 117.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 564.48 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 136.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2501.75 ms. Allocated memory is still 153.1 MB. Free memory was 136.2 MB in the beginning and 107.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 29.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] int k, y, x, c; [L19] k = __VERIFIER_nondet_int() [L21] y = 0 [L22] x = 0 [L23] c = 0 [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND FALSE !(!(cond)) [L26] RET __VERIFIER_assert((y * y) - 2 * x + y == 0) [L28] COND FALSE !(!(c < k)) [L31] c = c + 1 [L32] y = y + 1 [L33] x = y + x [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND FALSE !(!(cond)) [L26] RET __VERIFIER_assert((y * y) - 2 * x + y == 0) [L28] COND FALSE !(!(c < k)) [L31] c = c + 1 [L32] y = y + 1 [L33] x = y + x [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND FALSE !(!(cond)) [L26] RET __VERIFIER_assert((y * y) - 2 * x + y == 0) [L28] COND FALSE !(!(c < k)) [L31] c = c + 1 [L32] y = y + 1 [L33] x = y + x [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND TRUE !(cond) [L12] CALL reach_error() [L3] __assert_fail("0", "ps2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 29 SDslu, 191 SDs, 0 SdLazy, 99 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=4, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 3809 SizeOfPredicates, 6 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 10/19 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...