/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:30:40,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:30:40,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:30:40,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:30:40,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:30:40,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:30:40,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:30:40,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:30:40,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:30:40,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:30:40,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:30:40,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:30:40,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:30:40,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:30:40,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:30:40,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:30:40,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:30:40,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:30:40,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:30:40,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:30:40,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:30:40,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:30:40,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:30:40,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:30:40,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:30:40,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:30:40,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:30:40,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:30:40,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:30:40,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:30:40,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:30:40,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:30:40,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:30:40,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:30:40,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:30:40,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:30:40,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:30:40,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:40,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:30:40,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:30:40,523 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:30:40,523 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:30:40,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:30:40,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:30:40,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:30:40,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:30:40,788 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:30:40,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2021-05-02 19:30:40,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a53fa31/916c886ccfc74e3d91895f44f12ed52b/FLAG489cf2228 [2021-05-02 19:30:41,230 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:30:41,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2021-05-02 19:30:41,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a53fa31/916c886ccfc74e3d91895f44f12ed52b/FLAG489cf2228 [2021-05-02 19:30:41,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a53fa31/916c886ccfc74e3d91895f44f12ed52b [2021-05-02 19:30:41,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:30:41,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:30:41,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:41,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:30:41,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:30:41,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cfcf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41, skipping insertion in model container [2021-05-02 19:30:41,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:30:41,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:30:41,400 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c[597,610] [2021-05-02 19:30:41,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:41,423 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:30:41,431 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c[597,610] [2021-05-02 19:30:41,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:41,466 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:30:41,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41 WrapperNode [2021-05-02 19:30:41,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:41,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:30:41,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:30:41,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:30:41,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:30:41,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:30:41,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:30:41,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:30:41,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (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 [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:30:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:30:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:30:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:30:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:30:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:30:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:30:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:30:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:30:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:30:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:30:41,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:30:41,793 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:30:41,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:41 BoogieIcfgContainer [2021-05-02 19:30:41,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:30:41,795 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:30:41,795 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:30:41,795 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:30:41,797 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:41" (1/1) ... [2021-05-02 19:30:41,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:41 BasicIcfg [2021-05-02 19:30:41,817 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:30:41,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:30:41,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:30:41,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:30:41,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:30:41" (1/4) ... [2021-05-02 19:30:41,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:41, skipping insertion in model container [2021-05-02 19:30:41,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:41" (2/4) ... [2021-05-02 19:30:41,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:41, skipping insertion in model container [2021-05-02 19:30:41,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:41" (3/4) ... [2021-05-02 19:30:41,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:41, skipping insertion in model container [2021-05-02 19:30:41,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:41" (4/4) ... [2021-05-02 19:30:41,821 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound5.cJordan [2021-05-02 19:30:41,824 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:30:41,842 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:30:41,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:30:41,871 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:30:41,871 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:30:41,871 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:30:41,871 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:30:41,871 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:30:41,871 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:30:41,872 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:30:41,872 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:30:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:41,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:41,886 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:41,887 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-02 19:30:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498376766] [2021-05-02 19:30:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:30:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 19:30:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:30:42,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498376766] [2021-05-02 19:30:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498376766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:42,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:42,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:30:42,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897537183] [2021-05-02 19:30:42,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:30:42,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:30:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:42,106 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:42,158 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 19:30:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:30:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:30:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:42,164 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:30:42,164 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:30:42,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:30:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 19:30:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:30:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 19:30:42,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-02 19:30:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:42,191 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 19:30:42,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 19:30:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:42,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:42,192 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:42,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:30:42,193 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-02 19:30:42,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:42,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018904661] [2021-05-02 19:30:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:42,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:42,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572442302] [2021-05-02 19:30:42,221 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 [2021-05-02 19:30:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:30:42,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:42,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:42,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018904661] [2021-05-02 19:30:42,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572442302] [2021-05-02 19:30:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572442302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:42,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:42,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:30:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399715966] [2021-05-02 19:30:42,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:30:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:30:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:30:42,508 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:42,621 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 19:30:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:30:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:30:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:42,623 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:30:42,623 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:30:42,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:30:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:30:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 19:30:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:30:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 19:30:42,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-02 19:30:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:42,628 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 19:30:42,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 19:30:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:42,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:42,629 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:42,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:30:42,844 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-02 19:30:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:42,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047910575] [2021-05-02 19:30:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:42,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676628226] [2021-05-02 19:30:42,853 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 [2021-05-02 19:30:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:30:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:42,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:42,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047910575] [2021-05-02 19:30:43,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676628226] [2021-05-02 19:30:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676628226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:43,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:43,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83701288] [2021-05-02 19:30:43,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:43,087 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:43,195 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-02 19:30:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:43,196 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:30:43,196 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:30:43,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:30:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 19:30:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:43,211 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-02 19:30:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:43,211 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:43,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:43,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:43,212 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:43,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:43,412 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-02 19:30:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197057589] [2021-05-02 19:30:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:43,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:43,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937907876] [2021-05-02 19:30:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:30:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:30:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:43,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197057589] [2021-05-02 19:30:43,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937907876] [2021-05-02 19:30:43,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937907876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:43,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:43,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:43,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028079963] [2021-05-02 19:30:43,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:43,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:43,664 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:43,789 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 19:30:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:43,790 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:43,790 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:30:43,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:30:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 19:30:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:30:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 19:30:43,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-02 19:30:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:43,795 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 19:30:43,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 19:30:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 19:30:43,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:43,796 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:44,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:44,011 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-02 19:30:44,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:44,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73890866] [2021-05-02 19:30:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:44,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:44,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780882491] [2021-05-02 19:30:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:30:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:30:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73890866] [2021-05-02 19:30:44,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780882491] [2021-05-02 19:30:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780882491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:44,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:30:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498960783] [2021-05-02 19:30:44,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:44,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:44,294 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:44,490 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-02 19:30:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:30:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 19:30:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:44,491 INFO L225 Difference]: With dead ends: 59 [2021-05-02 19:30:44,491 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:30:44,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:30:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:30:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-02 19:30:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:44,494 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-02 19:30:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:44,494 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:44,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:30:44,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:44,495 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:44,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:44,705 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 718222219, now seen corresponding path program 2 times [2021-05-02 19:30:44,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:44,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868508319] [2021-05-02 19:30:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:44,713 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:44,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449925360] [2021-05-02 19:30:44,713 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:44,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:30:44,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:30:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:30:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:46,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:46,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868508319] [2021-05-02 19:30:46,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:46,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449925360] [2021-05-02 19:30:46,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449925360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:46,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:46,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:30:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88337546] [2021-05-02 19:30:46,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:46,680 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:48,697 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-02 19:30:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:30:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 19:30:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:48,698 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:48,698 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:30:48,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1850.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:30:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:30:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:30:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:30:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:30:48,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 19:30:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:48,699 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:30:48,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:30:48,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:30:48,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:30:48,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:48 BasicIcfg [2021-05-02 19:30:48,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:30:48,903 INFO L168 Benchmark]: Toolchain (without parser) took 7652.90 ms. Allocated memory was 165.7 MB in the beginning and 238.0 MB in the end (delta: 72.4 MB). Free memory was 129.6 MB in the beginning and 138.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 64.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,903 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 165.7 MB. Free memory is still 146.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:30:48,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.00 ms. Allocated memory is still 165.7 MB. Free memory was 129.5 MB in the beginning and 149.5 MB in the end (delta: -20.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,903 INFO L168 Benchmark]: Boogie Preprocessor took 39.78 ms. Allocated memory is still 165.7 MB. Free memory was 149.5 MB in the beginning and 147.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,903 INFO L168 Benchmark]: RCFGBuilder took 286.74 ms. Allocated memory is still 165.7 MB. Free memory was 147.9 MB in the beginning and 132.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,903 INFO L168 Benchmark]: IcfgTransformer took 21.84 ms. Allocated memory is still 165.7 MB. Free memory was 132.7 MB in the beginning and 131.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,905 INFO L168 Benchmark]: TraceAbstraction took 7084.93 ms. Allocated memory was 165.7 MB in the beginning and 238.0 MB in the end (delta: 72.4 MB). Free memory was 130.6 MB in the beginning and 138.1 MB in the end (delta: -7.5 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:48,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 165.7 MB. Free memory is still 146.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.00 ms. Allocated memory is still 165.7 MB. Free memory was 129.5 MB in the beginning and 149.5 MB in the end (delta: -20.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.78 ms. Allocated memory is still 165.7 MB. Free memory was 149.5 MB in the beginning and 147.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.74 ms. Allocated memory is still 165.7 MB. Free memory was 147.9 MB in the beginning and 132.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 21.84 ms. Allocated memory is still 165.7 MB. Free memory was 132.7 MB in the beginning and 131.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7084.93 ms. Allocated memory was 165.7 MB in the beginning and 238.0 MB in the end (delta: 72.4 MB). Free memory was 130.6 MB in the beginning and 138.1 MB in the end (delta: -7.5 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7029.8ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 11.2ms, AutomataDifference: 2641.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 148 SDslu, 631 SDs, 0 SdLazy, 1022 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2194.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2373.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.7ms SsaConstructionTime, 144.5ms SatisfiabilityAnalysisTime, 2815.3ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1206 SizeOfPredicates, 27 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 27/60 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...