/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/sqrt1-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:43,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:43,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:43,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:43,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:43,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:43,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:43,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:43,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:43,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:43,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:43,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:43,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:43,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:43,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:43,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:43,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:43,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:43,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:43,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:43,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:43,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:43,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:43,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:43,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:43,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:43,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:43,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:43,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:43,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:43,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:43,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:43,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:43,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:43,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:43,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:43,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:43,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:43,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:43,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:43,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:43,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:43,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:43,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:43,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:43,585 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:43,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:43,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:43,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:43,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:43,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:43,823 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:43,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-02 22:51:43,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26883b31/46b09b03777d46e7b45c0ae838683c5b/FLAG616474fce [2021-05-02 22:51:44,224 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:44,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-02 22:51:44,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26883b31/46b09b03777d46e7b45c0ae838683c5b/FLAG616474fce [2021-05-02 22:51:44,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26883b31/46b09b03777d46e7b45c0ae838683c5b [2021-05-02 22:51:44,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:44,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:44,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:44,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:44,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:44,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2d1de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44, skipping insertion in model container [2021-05-02 22:51:44,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:44,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:44,384 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-02 22:51:44,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:44,400 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:44,411 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-02 22:51:44,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:44,434 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:44,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44 WrapperNode [2021-05-02 22:51:44,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:44,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:44,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:44,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:44,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:44,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:44,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:44,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:44,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (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 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:44,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:44,713 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:44,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:44 BoogieIcfgContainer [2021-05-02 22:51:44,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:44,715 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:44,715 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:44,715 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:44,717 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:44" (1/1) ... [2021-05-02 22:51:44,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:44 BasicIcfg [2021-05-02 22:51:44,734 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:44,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:44,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:44,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:44,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:44" (1/4) ... [2021-05-02 22:51:44,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215a8ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:44, skipping insertion in model container [2021-05-02 22:51:44,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:44" (2/4) ... [2021-05-02 22:51:44,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215a8ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:44, skipping insertion in model container [2021-05-02 22:51:44,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:44" (3/4) ... [2021-05-02 22:51:44,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215a8ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:44, skipping insertion in model container [2021-05-02 22:51:44,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:44" (4/4) ... [2021-05-02 22:51:44,743 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound5.cJordan [2021-05-02 22:51:44,748 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:44,752 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:44,762 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:44,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:44,780 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:44,780 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:44,780 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:44,780 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:44,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:44,781 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:44,781 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:44,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:44,813 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:44,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-02 22:51:44,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:44,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367511708] [2021-05-02 22:51:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:44,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:44,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:44,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:44,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367511708] [2021-05-02 22:51:44,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367511708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:44,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:44,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:44,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614509178] [2021-05-02 22:51:44,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:44,993 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:45,071 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 22:51:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:45,077 INFO L225 Difference]: With dead ends: 31 [2021-05-02 22:51:45,077 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:51:45,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:51:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:51:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:51:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 22:51:45,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 22:51:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:45,106 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 22:51:45,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 22:51:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:45,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:45,107 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:45,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:45,107 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-02 22:51:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056184523] [2021-05-02 22:51:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:45,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:45,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:45,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056184523] [2021-05-02 22:51:45,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056184523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:45,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:45,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:45,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659513941] [2021-05-02 22:51:45,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:45,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:45,254 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:45,496 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:45,498 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:45,498 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:51:45,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:51:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 22:51:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 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) [2021-05-02 22:51:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 22:51:45,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 22:51:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:45,514 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 22:51:45,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 22:51:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:51:45,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:45,516 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:45,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:45,518 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-02 22:51:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:45,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043641762] [2021-05-02 22:51:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:45,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:45,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867143360] [2021-05-02 22:51:45,530 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 22:51:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:45,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:45,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043641762] [2021-05-02 22:51:45,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867143360] [2021-05-02 22:51:45,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867143360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:45,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:45,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:45,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564069651] [2021-05-02 22:51:45,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:45,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:45,684 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:45,766 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 22:51:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:51:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:45,768 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:45,768 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 22:51:45,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 22:51:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 22:51:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 22:51:45,776 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 22:51:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:45,776 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 22:51:45,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 22:51:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:51:45,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:45,778 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 22:51:45,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 22:51:45,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-02 22:51:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:45,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108449200] [2021-05-02 22:51:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:46,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192485204] [2021-05-02 22:51:46,001 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 22:51:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:46,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108449200] [2021-05-02 22:51:46,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192485204] [2021-05-02 22:51:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192485204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:46,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:46,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:46,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001445236] [2021-05-02 22:51:46,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:46,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:46,141 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:46,208 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 22:51:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 22:51:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:46,210 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:46,210 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:46,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:51:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:51:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 22:51:46,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 22:51:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:46,214 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 22:51:46,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 22:51:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 22:51:46,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:46,215 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:46,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:46,429 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-02 22:51:46,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:46,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838629313] [2021-05-02 22:51:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:46,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:46,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785933567] [2021-05-02 22:51:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:46,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 22:51:46,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:46,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838629313] [2021-05-02 22:51:46,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:46,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785933567] [2021-05-02 22:51:46,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785933567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:46,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:46,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536812063] [2021-05-02 22:51:46,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:46,639 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:46,752 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 22:51:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:46,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 22:51:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:46,754 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:51:46,754 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:51:46,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:51:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 22:51:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 22:51:46,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 22:51:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:46,758 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 22:51:46,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 22:51:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:51:46,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:46,759 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:46,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:46,969 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-02 22:51:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:46,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404846136] [2021-05-02 22:51:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:46,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:46,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083644743] [2021-05-02 22:51:46,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:47,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:51:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 22:51:47,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:47,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404846136] [2021-05-02 22:51:47,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083644743] [2021-05-02 22:51:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083644743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:47,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:47,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633464214] [2021-05-02 22:51:47,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:47,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:47,122 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:47,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:47,195 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-02 22:51:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:47,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 22:51:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:47,197 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:47,197 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 22:51:47,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 22:51:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 22:51:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 22:51:47,201 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 22:51:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:47,202 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 22:51:47,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 22:51:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 22:51:47,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:47,202 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:47,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:47,409 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-02 22:51:47,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:47,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393713040] [2021-05-02 22:51:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:47,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802497319] [2021-05-02 22:51:47,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:47,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:47,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:47,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:47,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393713040] [2021-05-02 22:51:47,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:47,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802497319] [2021-05-02 22:51:47,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802497319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:47,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:47,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:47,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658380095] [2021-05-02 22:51:47,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:47,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:47,576 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:47,636 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 22:51:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 22:51:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:47,638 INFO L225 Difference]: With dead ends: 68 [2021-05-02 22:51:47,638 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 22:51:47,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 22:51:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 22:51:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:51:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 22:51:47,642 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 22:51:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:47,642 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 22:51:47,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 22:51:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 22:51:47,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:47,643 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:47,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:51:47,849 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-02 22:51:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:47,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434833997] [2021-05-02 22:51:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:47,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:47,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865308204] [2021-05-02 22:51:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:47,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 22:51:47,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:47,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:51:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:51:48,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434833997] [2021-05-02 22:51:48,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865308204] [2021-05-02 22:51:48,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865308204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:48,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:48,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:48,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966362562] [2021-05-02 22:51:48,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:48,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:48,011 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:48,121 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-02 22:51:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:51:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 22:51:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:48,123 INFO L225 Difference]: With dead ends: 72 [2021-05-02 22:51:48,123 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 22:51:48,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 22:51:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 22:51:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:51:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 22:51:48,127 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 22:51:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:48,127 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 22:51:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 22:51:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:51:48,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:48,128 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:48,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:48,344 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-02 22:51:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:48,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359817219] [2021-05-02 22:51:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:48,354 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:48,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9089874] [2021-05-02 22:51:48,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:48,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 22:51:48,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:48,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 22:51:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:48,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 22:51:48,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359817219] [2021-05-02 22:51:48,620 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9089874] [2021-05-02 22:51:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9089874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:48,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:48,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:51:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024400820] [2021-05-02 22:51:48,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:51:48,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:51:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:48,621 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:48,764 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-02 22:51:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:48,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 22:51:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:48,765 INFO L225 Difference]: With dead ends: 76 [2021-05-02 22:51:48,765 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 22:51:48,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:51:48,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 22:51:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 22:51:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 22:51:48,769 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 22:51:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:48,769 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 22:51:48,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 22:51:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:51:48,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:48,770 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:48,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:48,977 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-02 22:51:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198117708] [2021-05-02 22:51:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:48,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:48,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567884716] [2021-05-02 22:51:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 22:51:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:49,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 22:51:49,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:49,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198117708] [2021-05-02 22:51:49,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:49,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567884716] [2021-05-02 22:51:49,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567884716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:49,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:49,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037226524] [2021-05-02 22:51:49,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:49,231 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:49,280 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-02 22:51:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:49,281 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 22:51:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:49,282 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:49,282 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:51:49,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:51:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:51:49,283 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 22:51:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:51:49,283 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-02 22:51:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:49,283 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:51:49,283 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:51:49,284 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:51:49,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:49,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:49 BasicIcfg [2021-05-02 22:51:49,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:51:49,504 INFO L168 Benchmark]: Toolchain (without parser) took 5247.92 ms. Allocated memory was 206.6 MB in the beginning and 266.3 MB in the end (delta: 59.8 MB). Free memory was 172.0 MB in the beginning and 137.7 MB in the end (delta: 34.3 MB). Peak memory consumption was 95.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 206.6 MB. Free memory is still 188.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.51 ms. Allocated memory is still 206.6 MB. Free memory was 171.8 MB in the beginning and 161.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: Boogie Preprocessor took 64.43 ms. Allocated memory is still 206.6 MB. Free memory was 161.7 MB in the beginning and 189.4 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: RCFGBuilder took 213.74 ms. Allocated memory is still 206.6 MB. Free memory was 189.4 MB in the beginning and 174.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: IcfgTransformer took 19.16 ms. Allocated memory is still 206.6 MB. Free memory was 174.8 MB in the beginning and 173.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L168 Benchmark]: TraceAbstraction took 4769.43 ms. Allocated memory was 206.6 MB in the beginning and 266.3 MB in the end (delta: 59.8 MB). Free memory was 173.2 MB in the beginning and 137.7 MB in the end (delta: 35.4 MB). Peak memory consumption was 96.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:49,505 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 206.6 MB. Free memory is still 188.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.51 ms. Allocated memory is still 206.6 MB. Free memory was 171.8 MB in the beginning and 161.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.43 ms. Allocated memory is still 206.6 MB. Free memory was 161.7 MB in the beginning and 189.4 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 213.74 ms. Allocated memory is still 206.6 MB. Free memory was 189.4 MB in the beginning and 174.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.16 ms. Allocated memory is still 206.6 MB. Free memory was 174.8 MB in the beginning and 173.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4769.43 ms. Allocated memory was 206.6 MB in the beginning and 266.3 MB in the end (delta: 59.8 MB). Free memory was 173.2 MB in the beginning and 137.7 MB in the end (delta: 35.4 MB). Peak memory consumption was 96.3 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4729.2ms, OverallIterations: 10, TraceHistogramMax: 10, EmptinessCheckTime: 32.4ms, AutomataDifference: 1061.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 300 SDtfs, 117 SDslu, 1123 SDs, 0 SdLazy, 944 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 574.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 326 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 552.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=9, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 62.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.6ms SsaConstructionTime, 211.3ms SatisfiabilityAnalysisTime, 1264.2ms InterpolantComputationTime, 409 NumberOfCodeBlocks, 392 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 399 ConstructedInterpolants, 0 QuantifiedInterpolants, 1325 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1239 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 522/625 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...