/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/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:13,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:13,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:13,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:26:13,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:26:13,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:26:13,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:26:13,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:26:13,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:26:13,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:26:13,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:26:13,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:26:13,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:13,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:13,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:13,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:13,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:13,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:13,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:13,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:13,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:13,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:13,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:13,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:13,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:13,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:13,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:13,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:13,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:13,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:13,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:13,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:13,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:13,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:13,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:13,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:13,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:13,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:13,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:13,473 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:13,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:13,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:13,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:13,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:13,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:13,732 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:13,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-06 07:26:13,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b941774b6/64316731cb154355b3f47c9455b9b09e/FLAGaeba599b6 [2021-05-06 07:26:14,170 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:14,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-06 07:26:14,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b941774b6/64316731cb154355b3f47c9455b9b09e/FLAGaeba599b6 [2021-05-06 07:26:14,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b941774b6/64316731cb154355b3f47c9455b9b09e [2021-05-06 07:26:14,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:14,559 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:14,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:14,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:14,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:14,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b06d215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14, skipping insertion in model container [2021-05-06 07:26:14,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:14,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:14,671 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/cohendiv-ll_valuebound1.c[576,589] [2021-05-06 07:26:14,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:14,695 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:14,704 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/cohendiv-ll_valuebound1.c[576,589] [2021-05-06 07:26:14,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:14,733 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:14,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14 WrapperNode [2021-05-06 07:26:14,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:14,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:14,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:14,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:14,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:14,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:14,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:14,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:14,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (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 [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:14,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:14,999 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:15,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:15 BoogieIcfgContainer [2021-05-06 07:26:15,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:15,000 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:15,001 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:15,001 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:15,003 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:15" (1/1) ... [2021-05-06 07:26:15,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:15 BasicIcfg [2021-05-06 07:26:15,014 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:15,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:15,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:15,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:15,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:14" (1/4) ... [2021-05-06 07:26:15,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32459c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:15, skipping insertion in model container [2021-05-06 07:26:15,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (2/4) ... [2021-05-06 07:26:15,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32459c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:15, skipping insertion in model container [2021-05-06 07:26:15,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:15" (3/4) ... [2021-05-06 07:26:15,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32459c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:15, skipping insertion in model container [2021-05-06 07:26:15,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:15" (4/4) ... [2021-05-06 07:26:15,019 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.cJordan [2021-05-06 07:26:15,022 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:15,025 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:15,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:15,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:15,048 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:15,048 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:15,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:15,049 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:15,049 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:15,049 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:15,049 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:26:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:15,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,062 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:15,062 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:15,066 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-06 07:26:15,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:15,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040717983] [2021-05-06 07:26:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:26:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:26:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:26:15,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:15,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040717983] [2021-05-06 07:26:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040717983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:15,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:15,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634882454] [2021-05-06 07:26:15,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:15,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:15,257 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:15,334 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:15,335 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 07:26:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:15,340 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:15,340 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:15,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:26:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:26:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 07:26:15,383 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 07:26:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:15,384 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 07:26:15,384 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 07:26:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:15,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,386 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:15,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:15,386 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-06 07:26:15,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:15,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851121202] [2021-05-06 07:26:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:15,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:15,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456963688] [2021-05-06 07:26:15,426 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 [2021-05-06 07:26:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:15,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:15,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851121202] [2021-05-06 07:26:15,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:15,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456963688] [2021-05-06 07:26:15,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456963688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:15,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:15,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:15,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289415381] [2021-05-06 07:26:15,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:15,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:15,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:15,768 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-06 07:26:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:15,888 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 28 [2021-05-06 07:26:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:15,893 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:15,893 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:15,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:26:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:15,908 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 07:26:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:15,908 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:15,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-06 07:26:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 07:26:15,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,909 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:16,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:16,128 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-06 07:26:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607609615] [2021-05-06 07:26:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:16,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:16,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178643222] [2021-05-06 07:26:16,145 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 [2021-05-06 07:26:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:16,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:16,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607609615] [2021-05-06 07:26:16,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:16,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178643222] [2021-05-06 07:26:16,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178643222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:16,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:16,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:16,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554811283] [2021-05-06 07:26:16,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:16,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:16,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:16,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:16,301 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:16,389 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-06 07:26:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-06 07:26:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:16,391 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:16,391 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:26:16,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:26:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 07:26:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:26:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 07:26:16,397 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 07:26:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:16,397 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 07:26:16,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 07:26:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 07:26:16,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:16,398 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-06 07:26:16,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:16,622 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-06 07:26:16,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:16,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412067178] [2021-05-06 07:26:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:16,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354587283] [2021-05-06 07:26:16,633 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 [2021-05-06 07:26:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:26:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:16,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 07:26:16,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:16,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412067178] [2021-05-06 07:26:16,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:16,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354587283] [2021-05-06 07:26:16,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354587283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:16,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:16,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:16,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844834926] [2021-05-06 07:26:16,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:16,829 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:16,943 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-05-06 07:26:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 07:26:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:16,944 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:26:16,944 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:26:16,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:26:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:26:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-06 07:26:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:26:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-06 07:26:16,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 40 [2021-05-06 07:26:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:16,949 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-06 07:26:16,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-06 07:26:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:16,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:16,950 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-05-06 07:26:17,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:17,170 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:17,171 INFO L82 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2021-05-06 07:26:17,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:17,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469707337] [2021-05-06 07:26:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:17,180 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:17,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386217206] [2021-05-06 07:26:17,180 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 [2021-05-06 07:26:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:17,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:17,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:17,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 07:26:17,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469707337] [2021-05-06 07:26:17,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386217206] [2021-05-06 07:26:17,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386217206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:17,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:17,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409123434] [2021-05-06 07:26:17,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:17,325 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:17,387 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-05-06 07:26:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 07:26:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:17,390 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:17,390 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:26:17,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:26:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 07:26:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.0625) internal successors, (34), 34 states have internal predecessors, (34), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:26:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-06 07:26:17,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 50 [2021-05-06 07:26:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:17,395 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-06 07:26:17,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-06 07:26:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:26:17,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:17,396 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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, 1, 1, 1] [2021-05-06 07:26:17,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:17,613 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-06 07:26:17,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:17,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598293406] [2021-05-06 07:26:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:17,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:17,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114725127] [2021-05-06 07:26:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 07:26:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:26:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:17,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-06 07:26:17,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598293406] [2021-05-06 07:26:17,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114725127] [2021-05-06 07:26:17,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114725127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:17,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:17,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:26:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118360678] [2021-05-06 07:26:17,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:26:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:26:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:26:17,975 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 07:26:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:18,094 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-05-06 07:26:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:26:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-06 07:26:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:18,094 INFO L225 Difference]: With dead ends: 54 [2021-05-06 07:26:18,094 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:26:18,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:26:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:26:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:26:18,095 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) [2021-05-06 07:26:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:26:18,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-05-06 07:26:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:18,095 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:26:18,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 07:26:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:26:18,096 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:26:18,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:18,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:18 BasicIcfg [2021-05-06 07:26:18,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:26:18,317 INFO L168 Benchmark]: Toolchain (without parser) took 3758.56 ms. Allocated memory was 208.7 MB in the beginning and 312.5 MB in the end (delta: 103.8 MB). Free memory was 174.2 MB in the beginning and 210.5 MB in the end (delta: -36.3 MB). Peak memory consumption was 68.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 208.7 MB. Free memory is still 190.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.62 ms. Allocated memory is still 208.7 MB. Free memory was 174.1 MB in the beginning and 164.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: Boogie Preprocessor took 62.49 ms. Allocated memory is still 208.7 MB. Free memory was 164.1 MB in the beginning and 191.8 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: RCFGBuilder took 201.11 ms. Allocated memory is still 208.7 MB. Free memory was 191.8 MB in the beginning and 176.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: IcfgTransformer took 13.57 ms. Allocated memory is still 208.7 MB. Free memory was 176.1 MB in the beginning and 175.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L168 Benchmark]: TraceAbstraction took 3301.00 ms. Allocated memory was 208.7 MB in the beginning and 312.5 MB in the end (delta: 103.8 MB). Free memory was 174.5 MB in the beginning and 210.5 MB in the end (delta: -36.0 MB). Peak memory consumption was 69.3 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:18,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 208.7 MB. Free memory is still 190.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 172.62 ms. Allocated memory is still 208.7 MB. Free memory was 174.1 MB in the beginning and 164.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.49 ms. Allocated memory is still 208.7 MB. Free memory was 164.1 MB in the beginning and 191.8 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 201.11 ms. Allocated memory is still 208.7 MB. Free memory was 191.8 MB in the beginning and 176.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.57 ms. Allocated memory is still 208.7 MB. Free memory was 176.1 MB in the beginning and 175.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3301.00 ms. Allocated memory was 208.7 MB in the beginning and 312.5 MB in the end (delta: 103.8 MB). Free memory was 174.5 MB in the beginning and 210.5 MB in the end (delta: -36.0 MB). Peak memory consumption was 69.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3266.1ms, OverallIterations: 6, TraceHistogramMax: 7, EmptinessCheckTime: 10.9ms, AutomataDifference: 614.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 204 SDtfs, 143 SDslu, 842 SDs, 0 SdLazy, 563 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 352.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 375.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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: 60.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.1ms SsaConstructionTime, 141.7ms SatisfiabilityAnalysisTime, 935.4ms InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 792 SizeOfPredicates, 19 NumberOfNonLiveVariables, 771 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 179/189 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...