/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:34,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:34,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:34,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:34,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:34,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:34,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:34,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:34,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:34,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:34,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:34,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:34,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:34,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:34,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:34,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:34,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:34,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:34,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:34,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:34,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:34,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:34,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:34,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:34,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:44:34,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:34,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:34,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:34,978 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 22:44:35,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:35,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:35,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:35,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:35,014 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:35,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:35,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:35,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:35,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:35,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:35,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:35,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:35,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:35,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:35,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:35,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:35,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:35,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:35,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:35,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:35,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:35,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:35,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:35,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:35,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:35,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:35,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:35,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:35,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:35,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:35,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:35,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:35,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:35,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:35,520 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:35,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-11-06 22:44:35,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c201409/3af9e6a15ffd49d4a4b7c8c421d3c2aa/FLAG27d0c2dd6 [2020-11-06 22:44:36,249 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:36,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-11-06 22:44:36,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c201409/3af9e6a15ffd49d4a4b7c8c421d3c2aa/FLAG27d0c2dd6 [2020-11-06 22:44:36,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c201409/3af9e6a15ffd49d4a4b7c8c421d3c2aa [2020-11-06 22:44:36,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:36,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:36,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:36,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:36,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:36,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:36,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f039a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36, skipping insertion in model container [2020-11-06 22:44:36,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:36,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:36,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:36,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:36,939 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:36,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:36,980 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:36,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36 WrapperNode [2020-11-06 22:44:36,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:36,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:36,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:36,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:36,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:36,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2020-11-06 22:44:37,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:37,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:37,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:37,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:37,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (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 22:44:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:37,531 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:37,531 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 22:44:37,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:37 BoogieIcfgContainer [2020-11-06 22:44:37,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:37,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:37,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:37,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:37,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:36" (1/3) ... [2020-11-06 22:44:37,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:37, skipping insertion in model container [2020-11-06 22:44:37,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (2/3) ... [2020-11-06 22:44:37,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:37, skipping insertion in model container [2020-11-06 22:44:37,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:37" (3/3) ... [2020-11-06 22:44:37,574 INFO L111 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-11-06 22:44:37,595 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:37,599 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:37,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:37,656 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:37,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:37,656 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:37,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:37,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:37,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:37,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:37,660 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-06 22:44:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:44:37,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:37,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:37,700 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-11-06 22:44:37,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:37,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433200491] [2020-11-06 22:44:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,107 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 22:44:38,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433200491] [2020-11-06 22:44:38,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:38,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:38,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780129242] [2020-11-06 22:44:38,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:38,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:38,136 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-11-06 22:44:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:38,253 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-11-06 22:44:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:38,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-06 22:44:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:38,264 INFO L225 Difference]: With dead ends: 59 [2020-11-06 22:44:38,264 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:44:38,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:44:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:44:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:44:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-06 22:44:38,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-11-06 22:44:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:38,316 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-06 22:44:38,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-06 22:44:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:44:38,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:38,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:38,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:38,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-11-06 22:44:38,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:38,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680641957] [2020-11-06 22:44:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,458 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 22:44:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680641957] [2020-11-06 22:44:38,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:38,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:44:38,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597645276] [2020-11-06 22:44:38,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:38,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:38,463 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-11-06 22:44:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:38,624 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-06 22:44:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:44:38,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-06 22:44:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:38,626 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:44:38,627 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:44:38,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:44:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-06 22:44:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:44:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-06 22:44:38,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-11-06 22:44:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:38,639 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-06 22:44:38,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-06 22:44:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:44:38,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:38,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:38,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:44:38,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-11-06 22:44:38,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:38,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505803534] [2020-11-06 22:44:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:39,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:39,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505803534] [2020-11-06 22:44:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681916426] [2020-11-06 22:44:39,069 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 22:44:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:44:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:39,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-06 22:44:39,278 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-11-06 22:44:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-11-06 22:44:39,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,362 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,362 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-11-06 22:44:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,671 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,672 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-11-06 22:44:39,673 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,715 INFO L625 ElimStorePlain]: treesize reduction 24, result has 66.7 percent of original size [2020-11-06 22:44:39,728 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-06 22:44:39,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:48 [2020-11-06 22:44:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,899 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,900 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-11-06 22:44:39,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,914 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-11-06 22:44:39,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:40,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:40,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-06 22:44:40,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019763229] [2020-11-06 22:44:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:44:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:44:40,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:44:40,049 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 21 states. [2020-11-06 22:44:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:40,949 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-06 22:44:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:44:40,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-11-06 22:44:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:40,953 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:44:40,953 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:44:40,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:44:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:44:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-06 22:44:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:44:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-06 22:44:40,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-11-06 22:44:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:40,966 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-06 22:44:40,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:44:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-06 22:44:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:40,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:40,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:41,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:44:41,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1138583351, now seen corresponding path program 2 times [2020-11-06 22:44:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:41,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394099688] [2020-11-06 22:44:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:41,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:41,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:41,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394099688] [2020-11-06 22:44:41,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402533943] [2020-11-06 22:44:41,334 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 [2020-11-06 22:44:41,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:41,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:41,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:44:41,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577443682] [2020-11-06 22:44:41,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:44:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:44:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:44:41,482 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-11-06 22:44:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:41,832 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-11-06 22:44:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:44:41,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-11-06 22:44:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:41,834 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:44:41,834 INFO L226 Difference]: Without dead ends: 40 [2020-11-06 22:44:41,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:44:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-06 22:44:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-06 22:44:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:44:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:44:41,844 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:44:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:41,844 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:44:41,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:44:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:44:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:44:41,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:41,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:42,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:42,060 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1887781106, now seen corresponding path program 3 times [2020-11-06 22:44:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:42,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833137317] [2020-11-06 22:44:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:42,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:42,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833137317] [2020-11-06 22:44:42,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390522492] [2020-11-06 22:44:42,251 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 [2020-11-06 22:44:42,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:44:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:42,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:42,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:42,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:44:42,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563472001] [2020-11-06 22:44:42,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:44:42,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:44:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:44:42,396 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-11-06 22:44:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:42,662 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-11-06 22:44:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:44:42,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-11-06 22:44:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:42,663 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:44:42,663 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:44:42,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:44:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:44:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-06 22:44:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:44:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-11-06 22:44:42,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-11-06 22:44:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:42,673 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-11-06 22:44:42,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:44:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-11-06 22:44:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:44:42,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:42,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:42,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:42,891 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1759077844, now seen corresponding path program 4 times [2020-11-06 22:44:42,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:42,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456011273] [2020-11-06 22:44:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:42,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:42,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:42,984 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:42,985 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:42,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:44:43,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:43 BoogieIcfgContainer [2020-11-06 22:44:43,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:43,037 INFO L168 Benchmark]: Toolchain (without parser) took 6412.72 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 125.7 MB in the beginning and 146.7 MB in the end (delta: -20.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:43,037 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:43,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.47 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:43,039 INFO L168 Benchmark]: Boogie Preprocessor took 41.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:43,040 INFO L168 Benchmark]: RCFGBuilder took 509.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 97.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:43,040 INFO L168 Benchmark]: TraceAbstraction took 5498.61 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 97.0 MB in the beginning and 146.7 MB in the end (delta: -49.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:43,044 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 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 348.47 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.02 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 509.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 97.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5498.61 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 97.0 MB in the beginning and 146.7 MB in the end (delta: -49.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L32] COND TRUE i