/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/geo1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:17:55,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:17:55,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:17:55,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:17:55,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:17:55,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:17:55,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:17:55,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:17:55,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:17:55,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:17:55,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:17:55,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:17:55,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:17:55,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:17:55,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:17:55,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:17:55,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:17:55,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:17:55,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:17:55,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:17:55,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:17:55,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:17:55,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:17:55,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:17:55,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:17:55,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:17:55,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:17:55,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:17:55,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:17:55,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:17:55,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:17:55,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:17:55,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:17:55,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:17:55,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:17:55,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:17:55,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:17:55,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:17:55,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:17:55,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:17:55,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:17:55,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:17:55,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:17:55,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:17:55,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:17:55,397 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:17:55,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:17:55,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:17:55,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:17:55,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:17:55,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:17:55,728 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:17:55,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1-ll.c [2021-05-02 19:17:55,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08f67428/a3979d6db674427abebd7b7f76207012/FLAGabacd0799 [2021-05-02 19:17:56,224 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:17:56,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-ll.c [2021-05-02 19:17:56,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08f67428/a3979d6db674427abebd7b7f76207012/FLAGabacd0799 [2021-05-02 19:17:56,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08f67428/a3979d6db674427abebd7b7f76207012 [2021-05-02 19:17:56,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:17:56,259 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:17:56,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:17:56,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:17:56,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:17:56,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a38d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56, skipping insertion in model container [2021-05-02 19:17:56,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:17:56,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:17:56,431 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/geo1-ll.c[546,559] [2021-05-02 19:17:56,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:17:56,450 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:17:56,475 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/geo1-ll.c[546,559] [2021-05-02 19:17:56,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:17:56,517 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:17:56,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56 WrapperNode [2021-05-02 19:17:56,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:17:56,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:17:56,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:17:56,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:17:56,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:17:56,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:17:56,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:17:56,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:17:56,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (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 19:17:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:17:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:17:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:17:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:17:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:17:56,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:17:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:17:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:17:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:17:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:17:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:17:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:17:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:17:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:17:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:17:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:17:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:17:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:17:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:17:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:17:56,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:17:56,824 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:17:56,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:56 BoogieIcfgContainer [2021-05-02 19:17:56,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:17:56,826 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:17:56,826 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:17:56,826 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:17:56,828 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:56" (1/1) ... [2021-05-02 19:17:56,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:17:56 BasicIcfg [2021-05-02 19:17:56,842 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:17:56,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:17:56,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:17:56,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:17:56,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:17:56" (1/4) ... [2021-05-02 19:17:56,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9eaf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:17:56, skipping insertion in model container [2021-05-02 19:17:56,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:56" (2/4) ... [2021-05-02 19:17:56,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9eaf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:17:56, skipping insertion in model container [2021-05-02 19:17:56,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:56" (3/4) ... [2021-05-02 19:17:56,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9eaf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:17:56, skipping insertion in model container [2021-05-02 19:17:56,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:17:56" (4/4) ... [2021-05-02 19:17:56,864 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll.cJordan [2021-05-02 19:17:56,868 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:17:56,871 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:17:56,900 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:17:56,924 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:17:56,924 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:17:56,924 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:17:56,924 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:17:56,924 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:17:56,925 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:17:56,925 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:17:56,925 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:17:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 19:17:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:17:56,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:56,960 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:56,960 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1592337452, now seen corresponding path program 1 times [2021-05-02 19:17:56,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:56,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971497037] [2021-05-02 19:17:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:57,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:17:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:57,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:17:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:57,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 19:17:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:57,260 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 19:17:57,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971497037] [2021-05-02 19:17:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971497037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:17:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:17:57,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:17:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27424061] [2021-05-02 19:17:57,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:17:57,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:57,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:17:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:17:57,281 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 19:17:57,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:57,353 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-02 19:17:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:17:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2021-05-02 19:17:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:57,361 INFO L225 Difference]: With dead ends: 29 [2021-05-02 19:17:57,361 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 19:17:57,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:17:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 19:17:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 19:17:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 19:17:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 19:17:57,393 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-05-02 19:17:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:57,394 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 19:17:57,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 19:17:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 19:17:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:17:57,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:57,396 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:57,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:17:57,398 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash -720675636, now seen corresponding path program 1 times [2021-05-02 19:17:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:57,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734882055] [2021-05-02 19:17:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:57,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:57,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295181264] [2021-05-02 19:17:57,437 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 19:17:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:17:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:57,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:57,723 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 19:17:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734882055] [2021-05-02 19:17:57,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295181264] [2021-05-02 19:17:57,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295181264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:57,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:57,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:17:57,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559982334] [2021-05-02 19:17:57,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:17:57,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:17:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:17:57,729 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 19:17:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:57,830 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 19:17:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:17:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 22 [2021-05-02 19:17:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:57,833 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:17:57,833 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:17:57,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:17:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:17:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 19:17:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:17:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 19:17:57,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2021-05-02 19:17:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:57,849 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 19:17:57,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 19:17:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 19:17:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:17:57,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:57,857 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:58,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:17:58,058 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash 764954199, now seen corresponding path program 1 times [2021-05-02 19:17:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:58,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121869431] [2021-05-02 19:17:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:58,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:58,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488750141] [2021-05-02 19:17:58,070 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 19:17:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:17:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:17:58,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:58,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121869431] [2021-05-02 19:17:58,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488750141] [2021-05-02 19:17:58,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488750141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:58,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:58,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:17:58,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319206496] [2021-05-02 19:17:58,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:17:58,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:17:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:17:58,391 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:18:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:00,633 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-05-02 19:18:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:18:00,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 19:18:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:00,635 INFO L225 Difference]: With dead ends: 34 [2021-05-02 19:18:00,635 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:18:00,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:18:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:18:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:18:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:18:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-02 19:18:00,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-05-02 19:18:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:00,640 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-02 19:18:00,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:18:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-02 19:18:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:18:00,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:00,641 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] [2021-05-02 19:18:00,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:00,863 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash 791706517, now seen corresponding path program 1 times [2021-05-02 19:18:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:00,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199915789] [2021-05-02 19:18:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:00,874 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:00,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083596214] [2021-05-02 19:18:00,874 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 19:18:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:18:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:18:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199915789] [2021-05-02 19:18:01,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083596214] [2021-05-02 19:18:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083596214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:01,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:01,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:18:01,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267702069] [2021-05-02 19:18:01,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:18:01,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:18:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:18:01,119 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:18:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:01,223 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 19:18:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:18:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 19:18:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:01,226 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:18:01,227 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 19:18:01,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:18:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 19:18:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 19:18:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:18:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 19:18:01,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-05-02 19:18:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:01,244 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 19:18:01,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:18:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 19:18:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 19:18:01,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:01,245 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:01,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:01,446 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 75094188, now seen corresponding path program 2 times [2021-05-02 19:18:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:01,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481728101] [2021-05-02 19:18:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:01,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:01,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034987243] [2021-05-02 19:18:01,456 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 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 19:18:01,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:18:01,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:18:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:01,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:01,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:07,797 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 19:18:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:09,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:09,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:18:09,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:09,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481728101] [2021-05-02 19:18:09,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:09,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034987243] [2021-05-02 19:18:09,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034987243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:09,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:09,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:18:09,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002334462] [2021-05-02 19:18:09,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:18:09,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:09,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:18:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=126, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:18:09,894 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:18:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:23,389 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 19:18:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:18:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 19:18:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:23,391 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:18:23,391 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:18:23,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8256.9ms TimeCoverageRelationStatistics Valid=47, Invalid=223, Unknown=2, NotChecked=0, Total=272 [2021-05-02 19:18:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:18:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 19:18:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:18:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-02 19:18:23,397 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-05-02 19:18:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:23,397 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-02 19:18:23,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:18:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-02 19:18:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 19:18:23,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:23,400 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:23,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:23,601 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2107171765, now seen corresponding path program 3 times [2021-05-02 19:18:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12768813] [2021-05-02 19:18:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:23,608 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:23,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814715726] [2021-05-02 19:18:23,609 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 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 19:18:23,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:18:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:18:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:27,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:29,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 19:18:32,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:32,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12768813] [2021-05-02 19:18:32,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814715726] [2021-05-02 19:18:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814715726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:32,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:32,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:18:32,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832758660] [2021-05-02 19:18:32,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:18:32,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:18:32,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=42, Unknown=1, NotChecked=0, Total=56 [2021-05-02 19:18:32,013 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 19:18:47,255 WARN L205 SmtUtils]: Spent 14.70 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 19:18:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:51,426 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-02 19:18:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:18:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 19:18:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:51,427 INFO L225 Difference]: With dead ends: 41 [2021-05-02 19:18:51,427 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:18:51,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17390.6ms TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-05-02 19:18:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:18:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:18:51,428 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 19:18:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:18:51,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-05-02 19:18:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:51,428 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:18:51,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 19:18:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:18:51,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:18:51,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:18:51,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:18:51 BasicIcfg [2021-05-02 19:18:51,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:18:51,633 INFO L168 Benchmark]: Toolchain (without parser) took 55374.55 ms. Allocated memory was 215.0 MB in the beginning and 305.1 MB in the end (delta: 90.2 MB). Free memory was 180.1 MB in the beginning and 224.4 MB in the end (delta: -44.3 MB). Peak memory consumption was 46.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 215.0 MB. Free memory is still 196.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.98 ms. Allocated memory is still 215.0 MB. Free memory was 179.9 MB in the beginning and 198.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: Boogie Preprocessor took 39.37 ms. Allocated memory is still 215.0 MB. Free memory was 198.5 MB in the beginning and 196.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: RCFGBuilder took 265.98 ms. Allocated memory is still 215.0 MB. Free memory was 196.8 MB in the beginning and 182.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: IcfgTransformer took 16.87 ms. Allocated memory is still 215.0 MB. Free memory was 182.1 MB in the beginning and 181.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,633 INFO L168 Benchmark]: TraceAbstraction took 54788.87 ms. Allocated memory was 215.0 MB in the beginning and 305.1 MB in the end (delta: 90.2 MB). Free memory was 180.7 MB in the beginning and 224.4 MB in the end (delta: -43.7 MB). Peak memory consumption was 47.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:18:51,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 215.0 MB. Free memory is still 196.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.98 ms. Allocated memory is still 215.0 MB. Free memory was 179.9 MB in the beginning and 198.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.37 ms. Allocated memory is still 215.0 MB. Free memory was 198.5 MB in the beginning and 196.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 265.98 ms. Allocated memory is still 215.0 MB. Free memory was 196.8 MB in the beginning and 182.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.87 ms. Allocated memory is still 215.0 MB. Free memory was 182.1 MB in the beginning and 181.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 54788.87 ms. Allocated memory was 215.0 MB in the beginning and 305.1 MB in the end (delta: 90.2 MB). Free memory was 180.7 MB in the beginning and 224.4 MB in the end (delta: -43.7 MB). Peak memory consumption was 47.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 54707.5ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 18.6ms, AutomataDifference: 35468.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 115 SDtfs, 95 SDslu, 474 SDs, 0 SdLazy, 366 SolverSat, 34 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 19650.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 26034.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 69.6ms SsaConstructionTime, 189.7ms SatisfiabilityAnalysisTime, 17527.4ms InterpolantComputationTime, 181 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 175 ConstructedInterpolants, 1 QuantifiedInterpolants, 630 SizeOfPredicates, 17 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 60/78 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...