/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/fermat2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:48:34,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:48:34,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:48:34,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:48:34,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:48:34,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:48:34,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:48:34,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:48:34,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:48:34,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:48:34,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:48:34,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:48:34,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:48:34,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:48:34,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:48:34,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:48:34,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:48:34,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:48:34,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:48:34,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:48:34,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:48:34,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:48:34,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:48:34,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:48:34,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:48:34,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:48:34,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:48:34,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:48:34,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:48:34,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:48:34,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:48:34,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:48:34,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:48:34,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:48:34,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:48:34,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:48:34,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:48:34,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:48:34,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:48:34,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:48:34,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:48:34,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:48:34,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:48:34,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:48:34,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:48:34,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:48:34,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:48:34,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:48:34,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:48:34,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:48:34,107 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:48:34,107 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:48:34,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:48:34,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:48:34,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:48:34,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:48:34,464 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:48:34,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-02 20:48:34,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c71f08/099765cfbd2043978951d971b24de130/FLAGa7859b302 [2021-05-02 20:48:34,981 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:48:34,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-02 20:48:34,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c71f08/099765cfbd2043978951d971b24de130/FLAGa7859b302 [2021-05-02 20:48:35,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c71f08/099765cfbd2043978951d971b24de130 [2021-05-02 20:48:35,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:48:35,368 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:48:35,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:48:35,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:48:35,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:48:35,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9172d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35, skipping insertion in model container [2021-05-02 20:48:35,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:48:35,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:48:35,512 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/fermat2-ll_valuebound50.c[524,537] [2021-05-02 20:48:35,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:48:35,534 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:48:35,546 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/fermat2-ll_valuebound50.c[524,537] [2021-05-02 20:48:35,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:48:35,591 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:48:35,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35 WrapperNode [2021-05-02 20:48:35,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:48:35,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:48:35,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:48:35,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:48:35,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... [2021-05-02 20:48:35,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:48:35,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:48:35,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:48:35,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:48:35,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:48:36,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:48:36,032 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:48:36,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:48:36 BoogieIcfgContainer [2021-05-02 20:48:36,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:48:36,034 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:48:36,034 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:48:36,035 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:48:36,037 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:48:36" (1/1) ... [2021-05-02 20:48:36,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:48:36 BasicIcfg [2021-05-02 20:48:36,067 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:48:36,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:48:36,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:48:36,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:48:36,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:48:35" (1/4) ... [2021-05-02 20:48:36,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760f8615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:48:36, skipping insertion in model container [2021-05-02 20:48:36,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:48:35" (2/4) ... [2021-05-02 20:48:36,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760f8615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:48:36, skipping insertion in model container [2021-05-02 20:48:36,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:48:36" (3/4) ... [2021-05-02 20:48:36,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760f8615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:48:36, skipping insertion in model container [2021-05-02 20:48:36,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:48:36" (4/4) ... [2021-05-02 20:48:36,077 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound50.cJordan [2021-05-02 20:48:36,081 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:48:36,085 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:48:36,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:48:36,126 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:48:36,126 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:48:36,126 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:48:36,126 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:48:36,126 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:48:36,126 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:48:36,126 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:48:36,127 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:48:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:48:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:48:36,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:36,152 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:36,153 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:48:36,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:36,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810294010] [2021-05-02 20:48:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:48:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:48:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:48:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:48:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:48:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:48:36,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810294010] [2021-05-02 20:48:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810294010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:48:36,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:48:36,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:48:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756633163] [2021-05-02 20:48:36,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:48:36,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:48:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:48:36,495 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:48:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:36,562 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:48:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:48:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:48:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:36,569 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:48:36,569 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:48:36,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:48:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:48:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:48:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:48:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:48:36,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:48:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:36,599 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:48:36,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:48:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:48:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:48:36,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:36,601 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:36,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:48:36,601 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:36,602 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:48:36,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:36,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456012677] [2021-05-02 20:48:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:36,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:36,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325175591] [2021-05-02 20:48:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:48:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:48:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456012677] [2021-05-02 20:48:37,021 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325175591] [2021-05-02 20:48:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325175591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:37,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:37,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:48:37,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885823550] [2021-05-02 20:48:37,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:48:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:48:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:48:37,024 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:48:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:37,218 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 20:48:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:48:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:48:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:37,220 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:48:37,220 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:48:37,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:48:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:48:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:48:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:48:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 20:48:37,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 20:48:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:37,229 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 20:48:37,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:48:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 20:48:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:48:37,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:37,230 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:37,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:48:37,448 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -397056057, now seen corresponding path program 1 times [2021-05-02 20:48:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:37,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118062170] [2021-05-02 20:48:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:37,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:37,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241990612] [2021-05-02 20:48:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:48:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:37,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:48:37,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:37,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118062170] [2021-05-02 20:48:37,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:37,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241990612] [2021-05-02 20:48:37,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241990612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:37,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:48:37,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044169806] [2021-05-02 20:48:37,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:48:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:37,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:48:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:48:37,765 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:48:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:44,552 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-05-02 20:48:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:48:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:48:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:44,558 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:48:44,558 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:48:44,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:48:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:48:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:48:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:48:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 20:48:44,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 20:48:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:44,564 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 20:48:44,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:48:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 20:48:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:48:44,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:44,565 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:48:44,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:44,781 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-02 20:48:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:44,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490922495] [2021-05-02 20:48:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:44,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:44,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535004043] [2021-05-02 20:48:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:48:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:48:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:44,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:44,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:44,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:45,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:45,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:48:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490922495] [2021-05-02 20:48:45,140 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535004043] [2021-05-02 20:48:45,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535004043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:45,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:45,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:48:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834290971] [2021-05-02 20:48:45,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:48:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:48:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:48:45,141 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:48:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:48:58,670 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-02 20:48:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:48:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:48:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:48:58,673 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:48:58,673 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:48:58,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:48:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:48:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 20:48:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:48:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 20:48:58,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 20:48:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:48:58,680 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 20:48:58,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:48:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 20:48:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:48:58,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:48:58,681 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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 20:48:58,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:58,907 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:48:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:48:58,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1603865781, now seen corresponding path program 2 times [2021-05-02 20:48:58,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:48:58,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965213803] [2021-05-02 20:48:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:48:58,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:48:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953150845] [2021-05-02 20:48:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:48:58,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:48:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:48:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:48:59,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:48:59,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:48:59,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965213803] [2021-05-02 20:48:59,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953150845] [2021-05-02 20:48:59,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953150845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:59,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:59,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:48:59,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093079103] [2021-05-02 20:48:59,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:48:59,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:48:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:48:59,262 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:49:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:01,790 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 20:49:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:49:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 20:49:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:01,791 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:49:01,792 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:49:01,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:49:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:49:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 20:49:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:49:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 20:49:01,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 20:49:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:01,797 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 20:49:01,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:49:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 20:49:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:49:01,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:01,800 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:02,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:02,007 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1737152313, now seen corresponding path program 3 times [2021-05-02 20:49:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:02,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099301842] [2021-05-02 20:49:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:02,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:02,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728756283] [2021-05-02 20:49:02,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:02,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:49:02,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:49:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 20:49:02,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:02,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099301842] [2021-05-02 20:49:02,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728756283] [2021-05-02 20:49:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728756283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:02,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:02,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:49:02,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359078432] [2021-05-02 20:49:02,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:49:02,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:49:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:49:02,205 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:49:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:06,293 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-05-02 20:49:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:49:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 20:49:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:06,295 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:49:06,295 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:49:06,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:49:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:49:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 20:49:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:49:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 20:49:06,301 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 20:49:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:06,302 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 20:49:06,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:49:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 20:49:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:49:06,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:06,303 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:06,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:49:06,504 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash -479214138, now seen corresponding path program 1 times [2021-05-02 20:49:06,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:06,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24648593] [2021-05-02 20:49:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:06,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:06,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997296041] [2021-05-02 20:49:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:49:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:49:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:06,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:16,906 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:49:21,026 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:49:21,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:21,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:21,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,296 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:49:27,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:27,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:37,970 WARN L205 SmtUtils]: Spent 7.32 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:49:52,145 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:49:52,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 41 refuted. 4 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:49:52,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:52,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24648593] [2021-05-02 20:49:52,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:52,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997296041] [2021-05-02 20:49:52,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997296041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:52,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:52,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:49:52,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126665011] [2021-05-02 20:49:52,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:49:52,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:49:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 20:49:52,210 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:50:33,296 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:50:44,125 WARN L205 SmtUtils]: Spent 10.61 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:51:02,372 WARN L205 SmtUtils]: Spent 6.85 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:51:53,418 WARN L205 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:51:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:55,456 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-05-02 20:51:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:51:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2021-05-02 20:51:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:55,467 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:51:55,467 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:51:55,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 84037.4ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 20:51:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:51:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-05-02 20:51:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:51:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-05-02 20:51:55,476 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 65 [2021-05-02 20:51:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:55,476 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-05-02 20:51:55,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:51:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-05-02 20:51:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:51:55,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:55,478 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:55,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:55,687 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2076715181, now seen corresponding path program 2 times [2021-05-02 20:51:55,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:55,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639248514] [2021-05-02 20:51:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:55,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:55,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634659784] [2021-05-02 20:51:55,696 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 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 20:51:55,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:55,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:55,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:51:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:55,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:55,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 20:51:56,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:56,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639248514] [2021-05-02 20:51:56,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:56,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634659784] [2021-05-02 20:51:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634659784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:56,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:56,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:51:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886538159] [2021-05-02 20:51:56,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:51:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:51:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:51:56,116 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:51:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:56,476 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-05-02 20:51:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:51:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 20:51:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:56,478 INFO L225 Difference]: With dead ends: 100 [2021-05-02 20:51:56,478 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 20:51:56,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:51:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 20:51:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-02 20:51:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:51:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 20:51:56,488 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 73 [2021-05-02 20:51:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:56,488 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 20:51:56,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:51:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 20:51:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:51:56,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:56,490 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:56,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:56,697 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 685754451, now seen corresponding path program 3 times [2021-05-02 20:51:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842451780] [2021-05-02 20:51:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:56,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:56,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883197081] [2021-05-02 20:51:56,705 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 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 20:51:56,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:51:56,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:56,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:51:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:56,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:56,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:51:57,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842451780] [2021-05-02 20:51:57,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883197081] [2021-05-02 20:51:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883197081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:57,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:57,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:51:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200505411] [2021-05-02 20:51:57,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:51:57,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:57,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:51:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:51:57,067 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:52:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:01,206 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-05-02 20:52:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:52:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 20:52:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:01,208 INFO L225 Difference]: With dead ends: 112 [2021-05-02 20:52:01,208 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:01,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:52:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:52:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:01,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 20:52:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:01,208 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:01,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:52:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:01,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:01,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:52:01,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:01 BasicIcfg [2021-05-02 20:52:01,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:01,415 INFO L168 Benchmark]: Toolchain (without parser) took 206046.66 ms. Allocated memory was 226.5 MB in the beginning and 272.6 MB in the end (delta: 46.1 MB). Free memory was 192.7 MB in the beginning and 117.1 MB in the end (delta: 75.5 MB). Peak memory consumption was 121.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 226.5 MB. Free memory is still 209.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.16 ms. Allocated memory is still 226.5 MB. Free memory was 192.4 MB in the beginning and 211.0 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: Boogie Preprocessor took 55.12 ms. Allocated memory is still 226.5 MB. Free memory was 210.7 MB in the beginning and 208.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: RCFGBuilder took 373.31 ms. Allocated memory is still 226.5 MB. Free memory was 208.9 MB in the beginning and 193.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: IcfgTransformer took 33.50 ms. Allocated memory is still 226.5 MB. Free memory was 193.7 MB in the beginning and 192.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,415 INFO L168 Benchmark]: TraceAbstraction took 205345.65 ms. Allocated memory was 226.5 MB in the beginning and 272.6 MB in the end (delta: 46.1 MB). Free memory was 192.1 MB in the beginning and 117.1 MB in the end (delta: 75.0 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:01,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 226.5 MB. Free memory is still 209.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 222.16 ms. Allocated memory is still 226.5 MB. Free memory was 192.4 MB in the beginning and 211.0 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.12 ms. Allocated memory is still 226.5 MB. Free memory was 210.7 MB in the beginning and 208.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 373.31 ms. Allocated memory is still 226.5 MB. Free memory was 208.9 MB in the beginning and 193.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.50 ms. Allocated memory is still 226.5 MB. Free memory was 193.7 MB in the beginning and 192.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 205345.65 ms. Allocated memory was 226.5 MB in the beginning and 272.6 MB in the end (delta: 46.1 MB). Free memory was 192.1 MB in the beginning and 117.1 MB in the end (delta: 75.0 MB). Peak memory consumption was 122.2 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 205286.1ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 24.5ms, AutomataDifference: 154994.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 224 SDtfs, 149 SDslu, 1186 SDs, 0 SdLazy, 1223 SolverSat, 77 SolverUnsat, 41 SolverUnknown, 0 SolverNotchecked, 115132.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 84986.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=8, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 62.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 91.0ms SsaConstructionTime, 389.8ms SatisfiabilityAnalysisTime, 47608.9ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 2713 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 396/538 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...