/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/fermat1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:35:15,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:35:15,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:35:15,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:35:15,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:35:15,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:35:15,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:35:15,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:35:15,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:35:15,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:35:15,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:35:15,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:35:15,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:35:15,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:35:15,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:35:15,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:35:15,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:35:15,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:35:15,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:35:15,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:35:15,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:35:15,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:35:15,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:35:15,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:35:15,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:35:15,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:35:15,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:35:15,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:35:15,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:35:15,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:35:15,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:35:15,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:35:15,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:35:15,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:35:15,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:35:15,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:35:15,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:35:15,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:35:15,674 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:35:15,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:35:15,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:35:15,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:35:15,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:35:15,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:35:15,910 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:35:15,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound2.c [2021-05-02 20:35:15,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b0fb7b9/a49157985b574ad8bec08ca715be8f59/FLAG4bf3218d9 [2021-05-02 20:35:16,299 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:35:16,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound2.c [2021-05-02 20:35:16,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b0fb7b9/a49157985b574ad8bec08ca715be8f59/FLAG4bf3218d9 [2021-05-02 20:35:16,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b0fb7b9/a49157985b574ad8bec08ca715be8f59 [2021-05-02 20:35:16,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:35:16,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:35:16,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:35:16,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:35:16,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:35:16,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d1b856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16, skipping insertion in model container [2021-05-02 20:35:16,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:35:16,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:35:16,428 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/fermat1-ll_valuebound2.c[535,548] [2021-05-02 20:35:16,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:35:16,444 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:35:16,451 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/fermat1-ll_valuebound2.c[535,548] [2021-05-02 20:35:16,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:35:16,466 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:35:16,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16 WrapperNode [2021-05-02 20:35:16,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:35:16,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:35:16,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:35:16,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:35:16,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:35:16,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:35:16,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:35:16,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:35:16,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (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 20:35:16,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:35:16,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:35:16,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:35:16,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:35:16,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:35:16,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:35:16,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:35:16,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:35:16,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:35:16,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:35:16,811 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:35:16,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:16 BoogieIcfgContainer [2021-05-02 20:35:16,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:35:16,812 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:35:16,812 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:35:16,813 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:35:16,814 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:16" (1/1) ... [2021-05-02 20:35:16,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:35:16 BasicIcfg [2021-05-02 20:35:16,826 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:35:16,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:35:16,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:35:16,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:35:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:35:16" (1/4) ... [2021-05-02 20:35:16,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8cb917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:35:16, skipping insertion in model container [2021-05-02 20:35:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:16" (2/4) ... [2021-05-02 20:35:16,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8cb917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:35:16, skipping insertion in model container [2021-05-02 20:35:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:16" (3/4) ... [2021-05-02 20:35:16,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8cb917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:35:16, skipping insertion in model container [2021-05-02 20:35:16,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:35:16" (4/4) ... [2021-05-02 20:35:16,830 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound2.cJordan [2021-05-02 20:35:16,842 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:35:16,845 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:35:16,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:35:16,879 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:35:16,879 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:35:16,879 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:35:16,879 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:35:16,879 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:35:16,879 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:35:16,880 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:35:16,880 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:35:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:35:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:35:16,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:16,898 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:16,898 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1042421720, now seen corresponding path program 1 times [2021-05-02 20:35:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:16,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410812851] [2021-05-02 20:35:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:35:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:35:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:35:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:35:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:35:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:35:17,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410812851] [2021-05-02 20:35:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410812851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:35:17,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:35:17,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:35:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598744767] [2021-05-02 20:35:17,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:35:17,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:35:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:35:17,141 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:17,207 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 20:35:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:35:17,208 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:35:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:17,212 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:35:17,213 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:35:17,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:35:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:35:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:35:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:35:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 20:35:17,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 20:35:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:17,234 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 20:35:17,235 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 20:35:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:35:17,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:17,236 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:17,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:35:17,236 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 104571547, now seen corresponding path program 1 times [2021-05-02 20:35:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:17,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510398476] [2021-05-02 20:35:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:17,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:17,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543406067] [2021-05-02 20:35:17,253 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 20:35:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:35:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:17,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:35:17,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510398476] [2021-05-02 20:35:17,562 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543406067] [2021-05-02 20:35:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543406067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:17,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:17,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:35:17,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379998180] [2021-05-02 20:35:17,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:35:17,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:35:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:35:17,565 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:21,716 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 20:35:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:35:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:35:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:21,722 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:35:21,722 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:35:21,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:35:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:35:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:35:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:35:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 20:35:21,728 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 20:35:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:21,728 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 20:35:21,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 20:35:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:35:21,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:21,729 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:21,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:35:21,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash -844389750, now seen corresponding path program 1 times [2021-05-02 20:35:21,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:21,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514568032] [2021-05-02 20:35:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:21,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:21,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789373369] [2021-05-02 20:35:21,949 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 20:35:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:21,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:35:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:35:22,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514568032] [2021-05-02 20:35:22,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789373369] [2021-05-02 20:35:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789373369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:22,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:22,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:35:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915589105] [2021-05-02 20:35:22,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:35:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:35:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:35:22,243 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:38,057 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-05-02 20:35:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:35:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:35:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:38,063 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:35:38,063 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:35:38,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:35:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:35:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:35:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:35:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 20:35:38,085 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 20:35:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:38,086 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 20:35:38,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 20:35:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:35:38,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:38,087 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:38,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:38,293 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2009827732, now seen corresponding path program 1 times [2021-05-02 20:35:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:38,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941741502] [2021-05-02 20:35:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:38,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:38,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493400856] [2021-05-02 20:35:38,302 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 20:35:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:35:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:38,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:38,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:00,295 WARN L205 SmtUtils]: Spent 18.85 s on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-02 20:36:00,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:00,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:00,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:00,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:10,998 WARN L205 SmtUtils]: Spent 10.67 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:36:11,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:36:11,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:11,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941741502] [2021-05-02 20:36:11,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:11,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493400856] [2021-05-02 20:36:11,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493400856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:36:11,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:36:11,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:36:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519752992] [2021-05-02 20:36:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:36:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:36:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-05-02 20:36:11,110 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:36:22,536 WARN L205 SmtUtils]: Spent 11.39 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:36:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:27,655 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-05-02 20:36:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:36:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 20:36:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:27,657 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:36:27,657 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:36:27,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43947.3ms TimeCoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:36:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:36:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-05-02 20:36:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:36:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-05-02 20:36:27,662 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 47 [2021-05-02 20:36:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:27,662 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-05-02 20:36:27,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:36:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-05-02 20:36:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:36:27,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:27,664 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:27,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:27,869 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2057504004, now seen corresponding path program 1 times [2021-05-02 20:36:27,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:27,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358901215] [2021-05-02 20:36:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:27,877 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:27,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164691067] [2021-05-02 20:36:27,877 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 20:36:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:27,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:36:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:27,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:27,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:28,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:28,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:49,828 WARN L205 SmtUtils]: Spent 18.81 s on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-02 20:36:49,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:49,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,524 WARN L205 SmtUtils]: Spent 10.67 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:37:00,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:37:00,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:00,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358901215] [2021-05-02 20:37:00,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:00,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164691067] [2021-05-02 20:37:00,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164691067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:37:00,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:37:00,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:37:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977424674] [2021-05-02 20:37:00,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:37:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:37:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-05-02 20:37:00,654 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:37:01,700 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-05-02 20:37:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:05,488 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:37:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:37:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 20:37:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:05,489 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:37:05,489 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:37:05,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33518.8ms TimeCoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:37:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:37:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:37:05,489 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 20:37:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:37:05,490 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 20:37:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:37:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:37:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:37:05,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:37:05,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:05,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:37:05 BasicIcfg [2021-05-02 20:37:05,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:37:05,694 INFO L168 Benchmark]: Toolchain (without parser) took 109375.32 ms. Allocated memory is still 177.2 MB. Free memory was 142.5 MB in the beginning and 73.3 MB in the end (delta: 69.2 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,694 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory was 159.4 MB in the beginning and 159.3 MB in the end (delta: 121.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:37:05,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.86 ms. Allocated memory is still 177.2 MB. Free memory was 142.4 MB in the beginning and 132.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,694 INFO L168 Benchmark]: Boogie Preprocessor took 55.78 ms. Allocated memory is still 177.2 MB. Free memory was 132.3 MB in the beginning and 160.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,694 INFO L168 Benchmark]: RCFGBuilder took 284.99 ms. Allocated memory is still 177.2 MB. Free memory was 160.8 MB in the beginning and 144.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,694 INFO L168 Benchmark]: IcfgTransformer took 13.65 ms. Allocated memory is still 177.2 MB. Free memory was 144.0 MB in the beginning and 143.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,695 INFO L168 Benchmark]: TraceAbstraction took 108867.12 ms. Allocated memory is still 177.2 MB. Free memory was 142.5 MB in the beginning and 73.3 MB in the end (delta: 69.2 MB). Peak memory consumption was 70.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:05,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory was 159.4 MB in the beginning and 159.3 MB in the end (delta: 121.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 145.86 ms. Allocated memory is still 177.2 MB. Free memory was 142.4 MB in the beginning and 132.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.78 ms. Allocated memory is still 177.2 MB. Free memory was 132.3 MB in the beginning and 160.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.99 ms. Allocated memory is still 177.2 MB. Free memory was 160.8 MB in the beginning and 144.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.65 ms. Allocated memory is still 177.2 MB. Free memory was 144.0 MB in the beginning and 143.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 108867.12 ms. Allocated memory is still 177.2 MB. Free memory was 142.5 MB in the beginning and 73.3 MB in the end (delta: 69.2 MB). Peak memory consumption was 70.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 108814.1ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 12.6ms, AutomataDifference: 41445.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 149 SDtfs, 128 SDslu, 412 SDs, 0 SdLazy, 413 SolverSat, 44 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 28732.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 77679.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.9ms SsaConstructionTime, 135.2ms SatisfiabilityAnalysisTime, 66097.2ms InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 201 ConstructedInterpolants, 15 QuantifiedInterpolants, 1097 SizeOfPredicates, 17 NumberOfNonLiveVariables, 606 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 133/152 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...